George decides to invite his mother-in-law for a brief stay, but a misheard conversation at the post office leads Harry Von Zell to spread word that the forthcoming visit has caused an enormous fight between George and Gracie.
The Friar's Club testimonial dinner for George and Gracie is sold out, but Gracie is intent on figuring out a way to get the Mortons and the Bagleys in.
Mr. Vanderlip entrusts his beloved parakeet with George while he's out of town but Gracie assumes it's her anniversary present and, feeling sorry for the caged bird, decides to set it free.
Blanche's freeloading brother comes to stay with the Mortons. Nothing is safe around him, including Harry Morton's clothes, George's cigars, and Harry von Zell's girlfriend.
George's apparently compulsive behavior as he appears to be searching for a lost five dollar bill leads to trouble, as Gracie, the Mortons, and Von Zell all try to help him regain his sanity.
Gracie mistakenly concludes that Blanche's devious brother Roger is going to marry Emily Vanderlip, so Roger uses the ensuing confusion to try to extort money from George.
Gracie tries to surprise George by having a wall safe installed, but she promptly locks the combination inside along with papers that he urgently needs access to. To rectify the situation, Gracie visits a pool hall to hire a safecracker.
After a friend confides that her presumed-dead first husband is still alive, Gracie visits a TV therapist to try to find a solution to the predicament.
Gracie would like to have the house painted coral, but George wants it to stay white. Once again, Von Zell and the Mortons get involved in a confusing situation, along with some befuddled house painters.
An impressionist impersonates the grocery delivery boy and wows Gracie and her friends, but when George contacts the real delivery boy to offer him a job on the show, he's baffled by the kid's lack of talent.
George has an important business meeting at the beach, but Gracie thinks it's a pleasure trip and invites their friends to tag along. Unfortunately, each time they're prepared to leave, some interruption detains them.
An unsuccessful uranium prospecting expedition by the two Harrys sets the stage for a showdown between them and George over partnerships in non-existent mines.
When Blanche's brother shows up unexpectedly, it causes such a rift between Blanche and Harry that she decides to leave him. Blanche and Roger take up residence at the Burns' home, so George rooms with Harry, fearing his own divorce.
Danny Goodman, an old vaudeville partner of George's, comes to visit. Trouble starts when they decide to dress in prison outfits and reprise their "jailbird" song and dance routine.
Harry Morton arranges a job for Roger out of state, so Roger fakes amnesia - but he lets George in on the scam, knowing no one else would believe it's a ruse. To find a cure, Gracie goes to a doctor and claims she's the one with amnesia.
Harry Morton and George thwart their wives' plans for a Hawaiian vacation until Blanche's brother unexpectedly arrives - and then they can't wait to get away.
While on a train to New York, Gracie confuses a salesman with a famous nuclear scientist. Gracie also plays cards with the scientist -- and wins every time.
A beautiful young gold digger woos Harry Von Zell and then sets her sights on Ronnie, who perceives a date with this slightly "older woman" as the exact life experience that he needs to effectively portray a character in his latest play.
As part of his plan to become a dramatic actor, Ronnie changes his name to Cobb Cochran, so Gracie changes her name to Lola Benedict, but a misunderstood phone call leads everyone to believe George is cheating on Gracie with Lola.
While visiting the book store to push George's autobiography, Blanche wallops a man whom she mistakes for a masher, not knowing he's the same guy that Harry has made business-dinner plans with. Meanwhile, Ronnie decides to get a motorcycle.
There are plans for George's autobiography to be adapted as a stage musical, and everyone is eager to invest - not knowing that George wants to star as himself. Meanwhile, Ronnie and Velma endlessly rehearse their own play.
It's George's and Gracie's anniversary, and a party is planned. However, Mr. Boardman and his wife start having an argument, and in Gracie's effort to "fix" it, she winds up "unfixing" everyone else.
Marie, the hotel's new cigarette girl, attracts the attention of all the men in the building. When she gives Gracie a vague message about Ronnie's tickets for a trip to Connecticut, Gracie assumes her son is planning to elope with her.
For Christmas, Harry Morton invites his father and Blanche invites her brother. Unfortunately the hotel is booked solid - so Gracie attempts to create a vacancy. Meanwhile, Ronnie invites Jim so they can work on scripting a new play.