TV Series/TV Mini-Series, Sci-Fi (Sorted by Popularity Ascending)
3. The Flash (2014– )
TV-PG | 43 min | Action, Adventure, Drama
After being struck by lightning, Barry Allen wakes up from his coma to discover he's been given the power of super speed, becoming the Flash, fighting crime in Central City.
4. The 100 (2014– )
TV-14 | 43 min | Drama, Mystery, Sci-Fi
Set ninety-seven years after a nuclear war has destroyed civilization, when a spaceship housing humanity's lone survivors sends one hundred juvenile delinquents back to Earth, in hopes of possibly re-populating the planet.
5. Arrow (2012– )
TV-14 | 42 min | Action, Adventure, Crime
Spoiled billionaire playboy Oliver Queen is missing and presumed dead when his yacht is lost at sea. He returns five years later a changed man, determined to clean up the city as a hooded vigilante armed with a bow.
7. Watchmen (2019– )
60 min | Action, Drama, Mystery | Active
A continuation of the acclaimed graphic novel, this HBO original series takes place in contemporary America, where costumed heroes are outlawed and the doomsday clock continues to tick.
14. DC's Legends of Tomorrow (2016– )
TV-14 | 42 min | Action, Adventure, Drama
Time-travelling rogue Rip Hunter has to recruit a rag-tag team of heroes and villains to help prevent an apocalypse that could impact not only Earth, but all of time.
19. The OA (2016– )
TV-MA | 60 min | Drama, Fantasy, Mystery
Having gone missing seven years ago, the previously blind Prairie returns home, now in her twenties with her sight restored. While many believe she is a miracle, others worry that she could be dangerous.
21. Star Trek: Discovery (2017– )
TV-14 | 60 min | Action, Adventure, Drama
Ten years before Kirk, Spock, and the Enterprise, the USS Discovery discovers new worlds and lifeforms as one Starfleet officer learns to understand all things alien.
24. The Expanse (2015– )
TV-14 | 60 min | Drama, Mystery, Sci-Fi
A police detective in the asteroid belt, the first officer of an interplanetary ice freighter and an earth-bound United Nations executive slowly discover a vast conspiracy that threatens the Earth's rebellious colony on the asteroid belt.
30. The Punisher (2017–2019)
TV-MA | 53 min | Action, Adventure, Crime
After the murder of his family, Marine veteran Frank Castle becomes the vigilante known as "The Punisher," with only one goal in mind: to avenge them.
32. Star Trek: The Next Generation (1987–1994)
TV-PG | 44 min | Action, Adventure, Mystery
Set almost 100 years after Captain Kirk's five-year mission, a new generation of Starfleet officers set off in the U.S.S. Enterprise-D on their own mission to go where no one has gone before.
34. Altered Carbon (2018– )
TV-MA | 60 min | Action, Drama, Sci-Fi
Set in a future where consciousness is digitized and stored, a prisoner returns to life in a new body and must solve a mind-bending murder to win his freedom.
36. The X-Files (1993– )
TV-14 | 45 min | Drama, Mystery, Sci-Fi
Two F.B.I. Agents, Fox Mulder the believer and Dana Scully the skeptic, investigate the strange and unexplained, while hidden forces work to impede their efforts.
37. Star Trek: Deep Space Nine (1993–1999)
TV-PG | 45 min | Action, Adventure, Drama
In the vicinity of the liberated planet of Bajor, the Federation space station Deep Space Nine guards the opening of a stable wormhole to the far side of the galaxy.
38. The Man in the High Castle (2015– )
TV-MA | 60 min | Drama, Sci-Fi, Thriller
In a dystopian America dominated by Nazi Germany and Imperial Japan, a young woman discovers a mysterious film that may hold the key to toppling the totalitarian regimes.
39. Smallville (2001–2011)
TV-PG | 60 min | Adventure, Drama, Romance
A young Clark Kent struggles to find his place in the world as he learns to harness his alien powers for good and deals with the typical troubles of teenage life in Smallville, Kansas.
42. Cloak & Dagger (2018– )
TV-14 | 44 min | Action, Adventure, Drama
Two teenagers from very different backgrounds find themselves burdened and awakened to newly acquired superpowers while growing closer together every day.
45. Star Trek: Voyager (1995–2001)
TV-PG | 44 min | Action, Adventure, Sci-Fi
Pulled to the far side of the galaxy, where the Federation is seventy-five years away at maximum warp speed, a Starfleet ship must cooperate with Maquis rebels to find a way home.
47. Z Nation (2014–2018)
TV-14 | 44 min | Action, Comedy, Drama
Three years after the zombie virus has gutted the United States of America a team of everyday heroes must transport the only known survivor of the plague from New York to California, where the last functioning viral lab waits for his blood.
48. Person of Interest (2011–2016)
TV-14 | 43 min | Action, Crime, Drama
An ex-assassin and a wealthy programmer save lives via a surveillance AI that sends them the identities of civilians involved in impending crimes. However, the details of the crimes--including the civilians' roles--are left a mystery.