best tv The Best Sci Fi Television Series of All Time  

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List Rules Sci-fi TV shows and series with science fiction elements

Here is a list of the best sci-fi shows and best sci-fi series of all time, as ranked by hundreds of Ranker voters. This list includes long-running sci-fi TV shows like Doctor Who as well as some of the best canceled shows of the genre. Science fiction TV shows have been around for decades, and some of the longest running shows have fallen into this category. Popular shows such as Star Trek have enjoyed several incarnations, and fan-favorite shows like Firefly and The X-Files have made the crossover from TV to the big screen.

Thanks to networks like SyFy, FX, and The CW, new sci-fi TV shows premiere every year. Sci-fi series like The Expanse, Orphan Black, and The 100 continue to raise viewership ratings and grow fan bases. Netflix has also contributed to the science fiction genre with their original series Stranger Things, which was met with rave reviews. 

Vote for your favorite science fiction shows to move them to the top of the list, or press re-rank to create your own list of your favorite science fiction series. Be sure to stop by to vote on the best British sitcoms and best current TV shows airing right now.

1
+ - 9,077 3,860
Firefly is listed (or ranked) 1 on the list The Best Sci Fi Television Series of All Time
Firefly Nathan Fillion, Gina Torres, Alan Tudyk

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2
+ - 6,759 3,279
Star Trek: The Next Generation is listed (or ranked) 2 on the list The Best Sci Fi Television Series of All Time
Star Trek: The Next Generation Patrick Stewart, Brent Spiner, Jonathan Frakes

3
+ - 8,087 3,277
Battlestar Galactica is listed (or ranked) 3 on the list The Best Sci Fi Television Series of All Time
Battlestar Galactica Edward James Olmos, Mary McDonnell, Jamie Bamber

4
+ - 5,799 2,547
Star Trek: The Original Series is listed (or ranked) 4 on the list The Best Sci Fi Television Series of All Time
Star Trek: The Original Series William Shatner, Leonard Nimoy, DeForest Kelley

5
+ - 6,995 3,936
Doctor Who is listed (or ranked) 5 on the list The Best Sci Fi Television Series of All Time
Doctor Who Peter Capaldi, Jenna Coleman, Matt Smith

6
+ - 6,030 2,713
The X-Files is listed (or ranked) 6 on the list The Best Sci Fi Television Series of All Time
The X-Files David Duchovny, Gillian Anderson, Mitch Pileggi

7
+ - 6,203 2,474
Stargate SG-1 is listed (or ranked) 7 on the list The Best Sci Fi Television Series of All Time
Stargate SG-1 Richard Dean Anderson, Michael Shanks, Amanda Tapping

8
+ - 4,191 2,272
The Twilight Zone is listed (or ranked) 8 on the list The Best Sci Fi Television Series of All Time
The Twilight Zone Rod Serling, Robert McCord, Jay Overholts

9
+ - 4,045 2,476
Star Trek: Deep Space Nine is listed (or ranked) 9 on the list The Best Sci Fi Television Series of All Time
Star Trek: Deep Space Nine Avery Brooks, Rene Auberjonois, Cirroc Lofton

10
+ - 5,238 4,169
Babylon 5 is listed (or ranked) 10 on the list The Best Sci Fi Television Series of All Time
Babylon 5 Jerry Doyle, Mira Furlan, Richard Biggs

11
+ - 4,873 2,802
Fringe is listed (or ranked) 11 on the list The Best Sci Fi Television Series of All Time
Fringe Anna Torv, Joshua Jackson, Jasika Nicole

12
+ - 4,199 2,608
Farscape is listed (or ranked) 12 on the list The Best Sci Fi Television Series of All Time
Farscape Ben Browder, Claudia Black, Anthony Simcoe

13
+ - 3,880 2,275
Star Trek: Voyager is listed (or ranked) 13 on the list The Best Sci Fi Television Series of All Time
Star Trek: Voyager Kate Mulgrew, Robert Beltran, Roxann Dawson

14
+ - 3,323 2,182
Quantum Leap is listed (or ranked) 14 on the list The Best Sci Fi Television Series of All Time
Quantum Leap Scott Bakula, Dean Stockwell, Deborah Pratt

15
+ - 3,568 1,985
Stargate Atlantis is listed (or ranked) 15 on the list The Best Sci Fi Television Series of All Time
Stargate Atlantis Joe Flanigan, Rachel Luttrell, David Hewlett

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16
+ - 3,454 2,013
Star Trek: Enterprise is listed (or ranked) 16 on the list The Best Sci Fi Television Series of All Time
Star Trek: Enterprise Scott Bakula, John Billingsley, Jolene Blalock

17
+ - 3,865 2,464
Futurama is listed (or ranked) 17 on the list The Best Sci Fi Television Series of All Time
Futurama Billy West, John DiMaggio, Katey Sagal

18
+ - 2,959 2,383
Torchwood is listed (or ranked) 18 on the list The Best Sci Fi Television Series of All Time
Torchwood John Barrowman, Eve Myles, Kai Owen

19
+ - 3,154 2,218
Eureka is listed (or ranked) 19 on the list The Best Sci Fi Television Series of All Time
Eureka Colin Ferguson, Salli Richardson-Whitfield, Erica Cerra

20
+ - 3,448 3,346
Lost is listed (or ranked) 20 on the list The Best Sci Fi Television Series of All Time
Lost Naveen Andrews, Matthew Fox, Jorge Garcia

21
+ - 3,052 2,703
Heroes is listed (or ranked) 21 on the list The Best Sci Fi Television Series of All Time
Heroes Hayden Panettiere, Jack Coleman, Milo Ventimiglia

22
+ - 1,836 784
Battlestar Galactica is listed (or ranked) 22 on the list The Best Sci Fi Television Series of All Time
Battlestar Galactica Edward James Olmos, Mary McDonnell, Jamie Bamber

23
+ - 2,191 1,803
The Outer Limits is listed (or ranked) 23 on the list The Best Sci Fi Television Series of All Time
The Outer Limits Kevin Conway, Joe Pascual

24
+ - 2,707 1,965
Warehouse 13 is listed (or ranked) 24 on the list The Best Sci Fi Television Series of All Time
Warehouse 13 Eddie McClintock, Joanne Kelly, Saul Rubinek

25
+ - 2,608 2,107
V is listed (or ranked) 25 on the list The Best Sci Fi Television Series of All Time
V Elizabeth Mitchell, Morris Chestnut, Joel Gretsch

26
+ - 2,216 1,770
Sliders is listed (or ranked) 26 on the list The Best Sci Fi Television Series of All Time
Sliders Jerry O'Connell, Sabrina Lloyd, John Rhys-Davies

27
+ - 2,203 1,976
Red Dwarf is listed (or ranked) 27 on the list The Best Sci Fi Television Series of All Time
Red Dwarf Chris Barrie, Craig Charles, Danny John-Jules

28
+ - 2,450 2,120
Terminator: The Sarah Connor C... is listed (or ranked) 28 on the list The Best Sci Fi Television Series of All Time
Terminator: The Sarah Connor Chronicles Lena Headey, Thomas Dekker, Summer Glau

29
+ - 1,432 424
The Expanse is listed (or ranked) 29 on the list The Best Sci Fi Television Series of All Time
The Expanse Shohreh Aghdashloo, Cas Anvar, Wes Chatham

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30
+ - 823 371
Agents of S.H.I.E.L.D. is listed (or ranked) 30 on the list The Best Sci Fi Television Series of All Time
Agents of S.H.I.E.L.D. Clark Gregg, Ming-Na Wen, Brett Dalton

31
+ - 2,202 1,782
Stargate Universe is listed (or ranked) 31 on the list The Best Sci Fi Television Series of All Time
Stargate Universe Robert Carlyle, Louis Ferreira, Brian J. Smith

32
+ - 1,508 1,232
The Hitchhiker's Guide to the ... is listed (or ranked) 32 on the list The Best Sci Fi Television Series of All Time
The Hitchhiker's Guide to the Galaxy Stephen Moore, Simon Jones, David Dixon

33
+ - 1,945 1,593
Falling Skies is listed (or ranked) 33 on the list The Best Sci Fi Television Series of All Time
Falling Skies Noah Wyle, Drew Roy, Maxim Knight

34
+ - 1,667 1,490
Continuum is listed (or ranked) 34 on the list The Best Sci Fi Television Series of All Time
Continuum Rachel Nichols, Stephen Lobo, Victor Webster

35
+ - 1,495 1,214
Buck Rogers in the 25th Centur... is listed (or ranked) 35 on the list The Best Sci Fi Television Series of All Time
Buck Rogers in the 25th Century Gil Gerard, Erin Gray, Felix Silla

36
+ - 1,680 1,572
The Six Million Dollar Man is listed (or ranked) 36 on the list The Best Sci Fi Television Series of All Time
The Six Million Dollar Man Lee Majors, Richard Anderson, Martin E. Brooks

37
+ - 1,825 1,966
Dollhouse is listed (or ranked) 37 on the list The Best Sci Fi Television Series of All Time
Dollhouse Eliza Dushku, Harry Lennix, Fran Kranz

38
+ - 1,892 1,695
Xena: Warrior Princess is listed (or ranked) 38 on the list The Best Sci Fi Television Series of All Time
Xena: Warrior Princess Lucy Lawless, Renée O'Connor, Ted Raimi

39
+ - 1,716 1,916
Space: 1999 is listed (or ranked) 39 on the list The Best Sci Fi Television Series of All Time
Space: 1999 Martin Landau, Barbara Bain, Nick Tate

40
+ - 1,787 1,753
Dark Angel is listed (or ranked) 40 on the list The Best Sci Fi Television Series of All Time
Dark Angel Jessica Alba, Michael Weatherly, Richard Gunn

41
+ - 889 580
The Flash is listed (or ranked) 41 on the list The Best Sci Fi Television Series of All Time
The Flash Grant Gustin, Candice Patton, Danielle Panabaker

42
+ - 1,663 1,751
Andromeda is listed (or ranked) 42 on the list The Best Sci Fi Television Series of All Time
Andromeda Kevin Sorbo, Lisa Ryder, Laura Bertram

43
+ - 1,492 1,419
Lost in Space is listed (or ranked) 43 on the list The Best Sci Fi Television Series of All Time
Lost in Space Guy Williams, June Lockhart, Mark Goddard

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44
+ - 1,095 438
The Magicians is listed (or ranked) 44 on the list The Best Sci Fi Television Series of All Time
The Magicians Barry Jones

45
+ - 1,346 1,269
Dune is listed (or ranked) 45 on the list The Best Sci Fi Television Series of All Time
Dune William Hurt, Alec Newman, Giancarlo Giannini

46
+ - 1,706 1,620
3rd Rock from the Sun is listed (or ranked) 46 on the list The Best Sci Fi Television Series of All Time
3rd Rock from the Sun John Lithgow, Jane Curtin, Kristen Johnston

47
+ - 1,281 1,341
The Incredible Hulk is listed (or ranked) 47 on the list The Best Sci Fi Television Series of All Time
The Incredible Hulk Bill Bixby, Lou Ferrigno, Jack Colvin

48
+ - 1,143 1,010
Planet of the Apes is listed (or ranked) 48 on the list The Best Sci Fi Television Series of All Time
Planet of the Apes Roddy McDowall, Ron Harper, James Naughton

49
+ - 1,357 1,124
Highlander: The Series is listed (or ranked) 49 on the list The Best Sci Fi Television Series of All Time
Highlander: The Series Adrian Paul, Stan Kirsch, Jim Byrnes

50
+ - 1,561 1,427
Terra Nova is listed (or ranked) 50 on the list The Best Sci Fi Television Series of All Time
Terra Nova Jason O'Mara, Shelley Conn, Christine Adams