How Many Episodes Of "Grey's Anatomy" Have You Seen?

The first shift for new surgical interns Meredith, Cristina, Izzie, George, and Alex proves eventful and backbreaking.

Izzie and Cristina are assigned a close-to-brain-dead John Doe who may be a viable candidate for organ donation, and helpful to George's patient, who needs a new liver. Meanwhile, Meredith and Alex butt heads over a patient of their own.

Meredith worries she did something wrong during a heart bypass, an error in a past procedure is discovered, putting a staff member's conduct under scrutiny, while a party thrown by Izzie to introduce her boyfriend becomes a fiasco.

Izzie and George find out about Meredith and Derek, while Cristina makes a discovery of her own. George thinks an anesthesiologist is drinking on the job, and Meredith deals with a young girl who has had illegal surgery.

George finally gets laid but gets syphilis. It's rampant among staff. Surgeon Webber is losing his sight. He wants Shepherd to operate secretly. A male patient has an ovary. A lifesaving autopsy's performed without consent.

A family is admitted after being involved in a car crash, but there is more to them than meets the eye. Meanwhile, Bailey and her team deal with a strange case, and relationship woes plague Meredith, Cristina and George.

Cristina is determined to get back to work, and despite not being fully recovered, she manages to crack an odd case. Meanwhile, Addison offers to help Bailey with a complicated surgery, and Alex receives important news.

A train wreck brings in multiple casualties, leaving Meredith hanging for her answer. Meanwhile, Alex finds working without his mojo a disheartening experience, and Cristina searches high and low for a missing appendage.

Friends of Derek and Addison come from New York for a preventative surgery that causes discord among both couples. Meanwhile, George helps a man who has fallen from a roof, and Bailey delivers news to the Chief.

Meredith's one night stand causes complications when he shows up at the hospital with an embarrassing problem. Meanwhile, Burke tries to push Cristina toward the next step, and Alex's problems affect his performance.

Christmas hits Seattle, with Izzie caring for a man who fell from his roof while hanging decorations. Meanwhile, Cristina helps perform a heart transplant on a depressed boy, and George has to contend with the family from Hell.

Meredith must choose between her dog and her roommates. Meanwhile, George deals with an elderly patient who has outstayed her welcome, Bailey's pregnancy has complications, Alex gets his exam results, and Richard has a strike on his hands.

The lives of everyone in the OR are threatened when a patient enters with a bomb inside him, and a young paramedic with her arm inside the cavity is the only thing keeping it from going off.

Derek and Addison are shaken by the arrival of a figure from their past. Meanwhile, Burke learns Cristina's secret, Izzie deals with a very unusual case, Meredith delves into her family's dirty laundry, and George pours his heart out.

Cristina babysits for Bailey and does not take to it well at all. Meanwhile, Addison and Derek come to terms with their relationship, George connects with Callie, and Denny continues to come between Alex and Izzie.

Cristina is desperate for George to move out of the apartment, while Izzie is jealous of Callie's relationship with him. Meanwhile, Cristina and Richard are rivals in a surgery seminar, and Meredith discovers a secret about her father.

The victims of a serious car accident are admitted, with every surgeon required to help. Meanwhile, Callie's forwardness grates on Izzie, Addison makes Alex suffer, and Derek takes his frustration out on Meredith.

Burke is admitted as a patient, along with Richard's niece. Izzie and the others fight to keep Denny alive, while Alex tries to secure the donor heart for him.

Everyone reminisces about the past. Meanwhile, Izzie is emotionally devastated, with the others trying to help her, Adele gives Richard an ultimatum, and George and Derek are put in quarantine when an outbreak of the plague is suspected.

Izzie returns to the hospital, but finds it difficult to go inside, and George is tired of Callie's presence at home. Meanwhile, Addison cannot seem to get rid of Mark, and Cristina tries to cope with caring for Burke.

Guilt causes different actions in everyone, the interns are allowed to attend an M&M meeting, and Derek and Addison finalize things.

Derek, George, Alex, Burke, Richard, Joe and Walter go on a camping trip. Meanwhile, Meredith assists Mark with gender reassignment surgery, Izzie avoids discussing her grief, Addison works with Callie, and Cristina feels Bailey's wrath.

A traumatic car accident fills the ER. Cristina has a crisis of conscience about her deceptive teamwork with Burke, Izzie pushes the boundaries of her probation, and Callie tries to explain herself to George.

As George's father's surgery approaches, he begins to realize how serious his condition is. Meanwhile, Izzie has to prove to Bailey that she is ready to scrub in on a surgery, and Meredith keeps running into her father.

George deals with his grief, Cristina and Burke continue to ignore each other, Addison avoids Alex, and Izzie decides to help Bailey with a project. Meanwhile, Richard makes a decision which sends all the attendings scrambling.

The interns each react differently to a mass-casualty incident. Meanwhile, George crosses the professional line with Callie, Cristina asks Burke to keep quiet about their engagement, and Richard dons a new hairstyle.

An unconscious Meredith interacts with some ghosts from her past while Richard, Burke and Bailey devise an unusual method of reviving her. A despondent Cristina leaves during her shift, and Derek speaks his mind to Meredith's mother.

The attendings face their board interviews. Meanwhile, Izzie seems to be the only one who remembers the night before, Derek is overly protective of Meredith when Mark offers her a surgery, and Callie's father pays a visit.

The Chairman of Seattle Grace's board of directors is admitted, and the attendings vie for his favor, while the interns study for exams. Izzy and George are reminded of their infidelity, and Burke presses Cristina about wedding plans.

Addison is pulled into the case of a high-risk surrogate mother, Meredith's stepmother develops a complication, Izzie struggles with George's decision, and Ava has surgery which may restore her memory.

The wedding day arrives. Richard chooses the new Chief and Chief Resident, the interns receive their exam results, Callie drops a bombshell on George while Izzie pours her heart out to him, and Burke makes an important decision.

Lexie persists in trying to get to know Meredith, and Mama Burke descends once more.

Meredith and her intern lose a patient after they give her the wrong diagnosis, Callie confronts Izzie, and McDreamy bonds with the other Grey.

A man survives a parachute accident without serious injury, two women refuse treatment because of a wedding contest, and Cristina and Izzie jockey for inclusion in Hahn's surgeries.

Bailey crosses the line when the guy she had a crush on in high school shows up in the ER during an onslaught of high school students involved in a bus crash. The Grey sisters run and hide when their father shows up drunk, while Derek tries to get back into the dating scene with another doctor and Cristina tries her best to get back into Hahn's good graces.

Tragedy abounds for everyone at Seattle Grace as they all continue in efforts to get the paramedic out of the overturned ambulance, stop the bleeding of a man who won't quit, and a bigot with a Nazi tattoo on his stomach. On the personal side, Rebecca returns to spend time with Alex, Miranda's husband finds it harder to wait for her while she's in surgery, and Cristina still tries to get on Hahn's good side, even though Bailey has put her elsewhere.

The judgment of the residents is skewed by a competition, Meredith tries therapy and a bear attack may be more than it appears.

The new clinical trial patient has a secret, Yang is dealt a blow from a distance by Burke, the nurses refuse to work with Sloan, and Meredith's therapist tells her some home truths.

A surgical team battles the clock as they try to save a boy encased in cement, Karev's situation with an ever-disintegrating Ava brings back painful memories that interfere with his judgment, Derek and Meredith have one last chance at their clinical trial.

Meredith and Derek find that "happily ever after" isn't as easy as they hoped, Cristina finds interest in a military doctor, and the Chief is surprised to hear that Seattle Grace is no longer ranked as a top-tier teaching hospital.

There is a huge problem affecting the whole hospital including patients too. Richard is trying to do his best to solve the problem.

Bailey's dream of a domino surgery crumbles when one of the donors learns of her husband's affair. Meredith is insulted when she gets no credit for the procedure she and Derek worked on together.

The residents and interns squabbling over procedures upsets Dr. Hunt, Erica discovers what happened to the heart she lost, and Derek asks Sloan to break out the McSteamy to distract Yang.

Sadie manipulates the interns into performing a procedure that goes horribly wrong, Izzie's ghost refuses to leave, and Mark bonds with a girl who's taken responsibility for her sleep-walking father.

Derek has trouble with objectivity concerning his death row patient, Cristina and Meredith continue their feud, Izzie confides her problem to Alex, and the Chief faces what's become of his life's work.

Meredith and Miranda each cross a line, William Dunn regrets his decision and Izzie finally confronts what Denny's appearance means.

Owen runs into someone very special from his past. Izzie employs her fellow doctors in a medical game made to help teach the interns. Naomi, Sam and Addison rush Archer to Seattle Grace and meet with Derek and Mark to save his life.

Derek's malpractice deposition reveals an unhappy statistic, the interns finally diagnose 'Patient X', Karev stands up to two attendings to save a band geek, and when Webber shuts Miranda out completely she makes a call.

Owen's PTSD endangers Cristina, Izzie's illness leaves the residents dealing with guilt and anger - at her expense, and Derek's fear causes him to persevere for Meredith's answer.

Izzie's mother comes to town, a little girl shoots her father triggering a conflict between Meredith and the chief, Thatcher reappears, and Callie gets her first taste of life without her trust fund.

Izzie is torn over whether to have Derek's proposed brain surgery. A soldier on medical leave asks for a radical operation so he can return to active duty. The Chief tries to lure Bailey back to general surgery with a new toy, and Mark shifts into high gear with major life changes.

Covering days one through 13, everyone at Seattle Grace fights to save Izzie and George's lives and then deals with the aftermath. Elsewhere, Hunt treats a double amputation, and Arizona has a teen with painful growth spurts.

As hospital personnel jockey for notice to keep from being fired, Izzie returns to surgery early and Bailey's triple aneurysm patient refuses her procedure because of her schizophrenic son.

As Mercy West merges with Seattle Grace, battle lines are drawn between the two hospital's residents over the patients.

When Isaac, the hospital lab tech, has an inoperable tumor wrapped around his spine, he turns to Dr. Derek Shepherd to do the impossible, and Derek tests the Chief's authority when Richard objects to moving forward with the risky surgery.

When Owen recruits his fellow Iraqi War vet, Dr. Teddy Altman, as the new cardiothoracic surgeon, Cristina questions Teddy's abilities in the OR and the nature of their past relationship. Meanwhile Izzie returns to Seattle Grace with her high school mentor seeking treatment for his dementia, and the stress of Richard's responsibilities, post-merger, are taking their toll.

Mark flies Addison to Seattle to help with a difficult procedure on his pregnant daughter, Sloan. Owen questions Teddy's motives when she assigns Cristina the lead on a complicated surgery, and Derek's suspicions are raised when the Chief recruits Meredith to assist with a high profile operation.

An intra-operative crisis casts a shadow over Derek's first day as interim chief, Owen's influence worries Cristina, Karev's first pediatric surgery case turns out to be more than babysitting and Webber resents the decision he must make.

In his new role as Chief, Derek restores the hospital lecture series, and several attendings present to the group pivotal surgical cases from their pasts: Bailey reflects on how shy she was as an intern until getting advice from Webber, Callie looks back on a polio case, and Richard recalls a case in which he and Ellis worked on a patient diagnosed with AIDS, known in 1982 as GRID.

A patient who needs an extremely difficult surgery comes to Seattle Grace, and it's Richard and Owen who vie for the opportunity to tackle it. But the decision lies in the hands of Derek, who deems that Owen should take on the surgery, leaving Richard bitter. Meanwhile, Bailey deals with her own personal struggles when she nervously prepares for another date with Ben.

Alex' brother Aaron comes to Seattle with a hernia and needs a pro bono operation. Having children is on everyone's minds and tensions are high because of it.

Bailey preps the team with mandatory sensitivity training prior to admitting a 700-pound patient with compounded medical issues, and the case proves to be challenging. Meanwhile Derek has to come face to face with a former patient's husband in a wrongful death deposition, and spending time with a heart patient's daughter opens up some old wounds for Cristina.

Seattle Grace Hospital is hit with a crisis like no other in its history.

Dereks near death experience results in reckless behaviour; Meredith has trouble getting cleared for surgery in the wake of the shooting and Cristina & Owen take their relationship to the next level.

When Derek receives an unexpected and unwelcome visit from his estranged sister, Amelia, issues between the siblings -- both past and present -- come to the surface; the Chief tries to help Alex when he notices that he's refusing to use the elevators after his near-fatal shooting; and Meredith and Derek continue their efforts to ease Cristina back into surgery after her post-traumatic stress.

As part of their training, the Chief puts Seattle Grace's residents -- including Meredith, Cristina, April and Jackson -- in charge; meanwhile, Derek, Callie, Owen and the other attending surgeons compete for a million-dollar grant.

The residents are pushed to their limits when Owen puts them through a rigorous trauma certification drill; meanwhile, Cristina is also tested when left alone to monitor a very ill lung transplant patient.

Derek lands the grant he needs for his clinical trial and all the attendings take him out to Joe's Bar to celebrate, but they get a surprise when they see someone they know already at the bar. Meanwhile, Meredith and Alex have to fend for themselves during the night shift with a nine-year-old patient who's experiencing post-surgical complications and his very pushy mother.

News of the incoming mass causalities after a gunman opens fire at a local college hits the staff hard when they must spring into action, even while their own wounds are still fresh; and Arizona does not receive a warm welcome home at the hospital.

Meredith feels left out when Derek breaks ground on his clinical trial; Bailey's new idea does not go over well with the chief; Callie irritates her new obstetrician.

Meredith, looking to prove she is Chief Resident material, learns that anything and everything can happen in an hour's time when she steps up to run the ER for a night; meanwhile, Bailey sneaks off with Eli and gets into a little mischief, and everyone is surprised when the Chief's wife, Adele, shows up as one of the ER patients.

Richard is desperate for Derek and Meredith to accept Adele into their Alzheimer's trial, but will Adele stand in her own way? Meanwhile Mark and Arizona have conflicting ideas of the kind of baby shower Callie wants, Teddy is freaked out when Henry has another health complication -- leaving them both a little exposed -- and the competitiveness amongst the residents for the Chief Resident position is amplified when Richard receives the green light for his diabetes clinical trial.

Everyone pulls together to help Callie and baby Sofia on their painstaking journeys to recovery in hopes of allowing mother and baby to finally meet; the sudden death of a clinical trial patient has Derek proceeding with more caution while Meredith makes a calculated and risky move; Alex treats a cranky old rich woman dying of cancer and gets an idea for a grandiose endeavor that is sure to get him the Chief Resident spot; and Teddy is pleasantly surprised by the return of a familiar face.

As the official Chief Resident interviews begin, everyone steps up their game in the hopes of impressing Owen. Meanwhile, Meredith anxiously prepares for her first interview with the social worker and Cristina fights for a shot in the operating room.

Meredith faces the repercussions of messing with the medical trial.

The chief makes a decision that shocks everyone at Seattle Grace.

The residents try to impress Jackson's mother, Catherine Avery.

Owen organizes a baseball game against Seattle Presbyterian.

Teddy is called away on another case, as Henry is brought in for surgery.

The doctors form two teams to operate on conjoined twins.

Meredith dreams of what her life would have been.

In a final attempt to save Erica's life, Amelia arrives at Seattle Grace to beg Derek for help with the gliosarcoma case; Cristina and Owen engage in heated arguments during marriage counseling; Alex realizes that in order to be a good doctor, he'll need to improve his people skills; and Meredith is given a chance to shine when a man enters the ER after getting his hand stuck in meat grinder. Meanwhile, the residents continue to study for their upcoming oral boards.

Derek encourages a hesitant Meredith to work with him again in neurology. When she complies, she listens as Derek is talking to a patient, who excitedly tells him about how she passed out in the middle of a big job interview. They're going to remove a cyst that's causing seizures. There is also a benign tumor that they aren't going to remove. Just as the procedure is past the opening skull stage, Derek is called to another OR where Morgan's baby is suffering from a brain bleed. He tells Lexi and Meredith to carry on. A slight bleed leads to another chunk of skull being removed. This opens up sight of the benign tumor. They decide to remove it because access is already present. Derek is incensed when he returns. It wasn't in the plan. When the patient awakes, she is unable to speak. Her parents threaten to sue. Jackson's mother, Catherine Avery, returns to Seattle Grace with a urology fellow, to replace a faulty bladder with one that Richard and Miranda have grown in the lab. During the procedure, Catherine develops an interest in Richard, becoming quite flirtatious. The fellow, Dr. Mara Keaton, was brought to be a spy for Catherine about how her son is doing. Jackson is forced to take her on a hospital tour. He is instantly suspicious of her motives and calls her on it. She admits that she is supposed to gather information on him. In turn, he advises Mara on how she can assert herself and gain his mother's respect. They try it out, defying her intent to take them to an awards banquet. The two of them trip off to find an empty on call room to get to know each other better. Richard is asked to the award banquet but turns her down at the last minute. Cristina becomes increasingly suspicious of Owen's every move. She finally corners nurse Emily, her prime suspect, and asks her point blank about sleeping with Owen. Emily says no. She uses a bit of flirting to get through long shifts. When Christina faces Owen, he admits he has been unfaithful to her. Alex has been working continuously to save Morgan's preemie. Callie watches Alex and Morgan work together and sees that Morgan is falling for him. He denies it. But when Morgan has her picture taken with him and the baby, you can see it in her body language.

Grey, Bailey, and Webber work on a multi-organ transplant but run into some barriers when Dr. Sloan, the temporary Chief, orders them to cancel the surgery. Meanwhile, Cristina and Owen spend the day at home, working through their marital problems.

As the fifth-years head off to San Francisco to take the most important exam of their lives there are some surprises along the way; Owen and Teddy continue to fight back at the hospital; Mark and Lexie reconnect; and Tommy's condition worsens.

Before the Seattle Grace doctors head to Boise to take part in an operation on conjoined twins, the Attendings pressure the 5th years for final decisions on their posts next year. Meanwhile, Arizona must face the reality of her friend's condition and Ben tries to get Bailey to go on a special lunch date.

Months after the plane crash, the doctors at Seattle continue to try and find a new sense of normalcy. With a new set of interns to put through the ringer, the new fellows and attendings get used to their roles while Cristina adjusts to her new life in Minnesota. But the life of one doctor hangs in the balance and it's clear that Seattle Grace Mercy West is not the same.

The survivors of the crash are presented with a settlement offer, which forces them to choose between putting the incident behind them or investigate the true cause. Meanwhile various events occur: Jackson and April struggle to work with each other, Bailey is annoyed by the new attendings' behaviors, Callie struggles to communicate with Arizona and Cristina learns to work with her new colleagues in Minnesota.

Split between Meredith in Seattle and Cristina in Minnesota, this episode shows each surgeon tackling an incredibly challenging surgery. Meredith must juggle work and parental obligations while Cristina is caught between Dr. Thomas and Dr. Parker.

It's Arizona's first day back at work and Callie tries to keep things as normal as possible for her. Meanwhile, Bailey argues with Ben over wedding plans and Cristina and Owen continue to struggle with their relationship while Owen faces his first set of meetings about the plane crash.

As a jittery Bailey prepares for her wedding, Meredith and Derek disagree on whether or not to go through with the nerve transplant from Lizzie. Then, Cristina learns of the real reason behind Owen's plea for a divorce and Jo finds herself in trouble when she accuses Alex of mishandling her training. Then, a last minute emergency changes everything.

The survivors receive a final verdict about the plane crash. Meanwhile, Derek continues to undergo rehabilitation on his hand, Cristina and Owen enjoy their new relationship with each other and Richard tried to avoid Catherine's advances.

While Derek and April try and find a way to save the ER, Cristina and Leah struggle to keep a patient alive while respecting his wishes. Alana is pulled into a surgery with Owen that may change the way she views the hospital's ER.

As the hospital inches closer to finding a buyer, many of the doctors don't like the new changes being made, causing the crash survivors to consider a crazy idea. Meanwhile, April's relationship with Matthew progresses and she asks Jackson for advice.

The transition to new management has the doctors at each others throats. Matters become worse when Owen quits, leaving the OR board in complete disarray.

When a giant gas tanker explodes on a highway, a couple of parents are admitted to the hospital while Owen looks after their son. Matthew is caught in the explosion and is admitted to the hospital while a single mother fights to find out what mysterious illness is plaguing her son.

At Jackson's request, the CDC arrives at the hospital to begin an investigation surrounding Bailey's patients. April blames Jackson for her breakup with Matthew and Alex tries to be nice to Jason. Owen continues to get closer to Ethan as his dad's health remains uncertain.

With a major storm rolling in, the hospital is chaotic. When Jason comes into the hospital in critical condition, Alex does everything he can to protect Jo. With Meredith's due date just weeks away, Derek urges her to slow down.

Following the storm, a mudslide injures first responders and citizens.

Derek and Meredith adjust to life at home with their newborn.

Meredith struggles to balance her roles as a surgeon and a mother.

Costumed patients create a challenge for the doctors; Derek and Ben work on a new surgical technique; Richard asks a resident to perform his next surgery, angering Bailey.

Callie's career is on the line when she is being sued for negligence after an operation on a star athlete goes horribly wrong.

April's visiting sisters get on her nerves; when Matthew and Jackson witness an accident, they must work together; Callie and Arizona work on their relationship.

The doctors face the consequences of the events that took place at April's wedding. Meredith feels betrayed when Derek goes back on a promise, Alex is furious after returning to the hospital and hearing the news about his father, and Arizona and Callie decide whether or not to move forward together. Meanwhile, Bailey realizes she was wrong about the motive behind Ben's decision to move back to Seattle.

Arizona's bad day escalates when she advises a patient on a potential double amputation; Derek breaks a promise; Stephanie and Jo find an abandoned baby; the nonfraternization rule leads to a suspension.

Follows Christina's life as she wonders how her life would take shape based on a single decision.

Meredith and Bailey tackle jealousy as Cristina receives an early morning phone call that might change her life; Callie comes to a shocking realization and Alex makes a decision.

Derek's sister Amelia comes for a visit; Alex confronts Arizona and the rest of the hospital about his decision; Dr Webber finds out the truth about Harper Avery award from Catherine.

While Bailey faces dire consequences for her reckless behavior, Cristina interviews candidates for Dr. Russell's replacement. Alex returns with a motive, disappointment hits Callie and Derek brings forth a shocking proposal to Meredith.

Callie and Arizona have to make a choice regarding surrogacy while the board has to decide whether to give Cristina's seat on the board to Alex or Bailey. Amelia overhears the truth about Maggie Pierce.

Owen introduces Callie to the Veterans Hospital patients in hopes that she will help them with her robotic limb lab, Jo becomes jealous of Alex and Meredith's friendship, and Maggie continues to confide in Richard. Meanwhile, Alex and Bailey prepare to go in front of the board.

Callie and Arizona examine their marital problems and what's contributed to them. Meanwhile, Callie devotes herself to the veterans' project; Arizona strives to impress Dr. Herman; and Richard seeks guidance from Bailey.

Arizona has to take care of one of Herman's patients. Everybody finds out Amelia was a drug addict and Derek lets her down. Jo has her first solo surgery. Maggie is invited to Ellis' house and Arizona decides to move in with Alex.

Meredith keeps herself busy while Derek prepares for his move; Jackson and April get difficult news; Arizona and Amelia talk about how best to approach Dr. Herman.

Meredith tries to find a sitter so she can go visit Derek, Amelia and Stephanie work together on a case.

The hospital doctors become fascinated with Dr. Herman's case when Amelia gives a lecture detailing the intricacies of the surgery. Arizona and Herman continue to bond over the amount of cases they are trying to complete before the big surgery. Meanwhile, Bailey brings them a case of a pregnant woman who is close to her heart.

An earthquake leaves Maggie trapped in an elevator and threatens Meredith's streak of successful surgeries; Owen gives medical advice over the phone; Ben opens up Jackson.

Rattled by recent events, Meredith tries to decide what to do about Derek; Owen is stunned when his mother is admitted to the hospital.

Upon realizing that Owen and Amelia have been seeing each other behind her back, Meredith comes down hard on her sister-in-law causing Amelia to rethink things. Meanwhile, Catherine springs into action when a man is brought into the hospital after his wife seeks revenge on his cheating ways.

Derek witnesses a horrible car crash and jumps in to save lives.

Months after Derek's funeral, Amelia struggles with her emotions; April plans on returning; and a part of Derek continues to grow in Meredith's life.

As the doctors continue to tackle an unfathomable crisis, they are reminded of what is important and brought closer together.

The pressure is on as a determined Bailey tackles her first day as Chief; meanwhile, April's marriage is in jeopardy and she finds herself unable to address her problems; Meredith struggles to juggle all her responsibilities and Amelia works to define her relationship with Owen.

Owen suggests the interns learn about breaking bad news to patients' families.

Penny's first day gets off to a rocky start. April brings a young patient from overseas with tumors on his hands. Jo and Stephanie's feud continues.

As the rumor mill around the hospital continues to spiral out of control, Grey Sloan Memorial is flooded with injured firefighters from a nearby wildfire. Maggie struggles to keep things with Andrew professional at work; meanwhile, Jo questions Alex's priorities. Also, Alex decides to make a big step in his life.

As the hospital deals with Meredith's trauma, Callie and Maggie perform a risky, experimental surgery on Alex's 15-year-old patient against his professional opinion. Meanwhile, Owen and Nathan are still at odds with each other, and Maggie and Andrew's relationship continues to develop.

A patient from Meredith's first surgery as an intern is re-admitted to the hospital with an aneurysm; Maggie thinks Richard knows about her relationship with Andrew; Arizona considers dating again.

Richard swaps pairings among the residents and attendings, baffling everyone. Meanwhile, Arizona makes a bold decision as she treats a woman who's carrying quadruplets; April faces a tough choice.

Meredith takes a step forward with Will but quickly regrets it; Maggie senses a disconnection with Andrew; and Amelia reevaluates her relationship with Owen. Meanwhile, Catherine comes into town and really shakes things up with April and Jackson

After a missing child forces the hospital into lockdown, Ben decides to operate on a pregnant mother without the proper surgical equipment. Miranda, as Chief, is faced with the repercussions of the event.

The doctors work frantically to save a young boy who was accidentally shot. Meanwhile, Arizona is upset when Callie tries to make an important decision about Sophia's future without consulting her.

Callie and Arizona are at odds over Sofia's future, and Stephanie questions the status of her relationship with Kyle. Meanwhile, Alex and April work on a pregnant teen that is readmitted to Grey Sloan Memorial.

Meredith and Maggie support Amelia on an important day; Jo reveals that she has been keeping secrets from Alex while Arizona and Callie deal with the impact of their custody arrangement. Meanwhile, Ben leaps into action to help a friend.

Meredith thinks about her loyalties while Alex deals with the fallout of his actions; Amelia and Owen host a dinner party with surprising guests; Jackson makes a suggestion to help April through her recovery.

Alex realizes the clinic doesn't make him less of a doctor while Meredith struggles with professionalism with Riggs

A familiar face returns to Grey Sloan throwing many of the doctors for a loop. With Catherine putting on the pressure, Bailey has to make a decision about Alex while a tough ER case makes Amelia's bad day even worse.