Total Nerd 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.

list ordered by

1
12,808 5,831
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
9,069 4,930
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
9,399 5,650
Doctor Who is listed (or ranked) 3 on the list The Best Sci Fi Television Series of All Time
Doctor Who Peter Capaldi, Jenna Coleman, Matt Smith

4
10,716 4,803
Battlestar Galactica is listed (or ranked) 4 on the list The Best Sci Fi Television Series of All Time
Battlestar Galactica Edward James Olmos, Mary McDonnell, Jamie Bamber

5
7,668 3,907
Star Trek: The Original Series is listed (or ranked) 5 on the list The Best Sci Fi Television Series of All Time
Star Trek: The Original Series William Shatner, Leonard Nimoy, DeForest Kelley

6
7,817 4,192
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
8,372 3,742
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
5,794 3,557
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
7,761 5,795
Babylon 5 is listed (or ranked) 9 on the list The Best Sci Fi Television Series of All Time
Babylon 5 Jerry Doyle, Mira Furlan, Richard Biggs

10
6,005 3,738
Farscape is listed (or ranked) 10 on the list The Best Sci Fi Television Series of All Time
Farscape Ben Browder, Claudia Black, Anthony Simcoe

11
5,713 3,716
Star Trek: Deep Space Nine is listed (or ranked) 11 on the list The Best Sci Fi Television Series of All Time
Star Trek: Deep Space Nine Avery Brooks, Rene Auberjonois, Cirroc Lofton

12
6,287 4,022
Fringe is listed (or ranked) 12 on the list The Best Sci Fi Television Series of All Time
Fringe Anna Torv, Joshua Jackson, Jasika Nicole

13
5,251 3,433
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
4,589 3,220
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
4,900 3,002
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
5,514 3,554
Futurama is listed (or ranked) 16 on the list The Best Sci Fi Television Series of All Time
Futurama Billy West, John DiMaggio, Katey Sagal

17
4,619 3,151
Star Trek: Enterprise is listed (or ranked) 17 on the list The Best Sci Fi Television Series of All Time
Star Trek: Enterprise Scott Bakula, John Billingsley, Jolene Blalock

18
4,133 3,444
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
4,429 3,219
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
4,455 4,849
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
3,996 3,917
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
3,860 2,877
Warehouse 13 is listed (or ranked) 22 on the list The Best Sci Fi Television Series of All Time
Warehouse 13 Eddie McClintock, Joanne Kelly, Saul Rubinek

23
3,317 1,615
Battlestar Galactica is listed (or ranked) 23 on the list The Best Sci Fi Television Series of All Time
JimmyPaton added Battlestar Galactica Edward James Olmos, Mary McDonnell, Jamie Bamber

24
2,961 2,702
The Outer Limits is listed (or ranked) 24 on the list The Best Sci Fi Television Series of All Time
Richard777 added The Outer Limits Kevin Conway, Joe Pascual

25
3,480 2,880
Red Dwarf is listed (or ranked) 25 on the list The Best Sci Fi Television Series of All Time
Red Dwarf Chris Barrie, Craig Charles, Danny John-Jules

26
3,323 3,116
V is listed (or ranked) 26 on the list The Best Sci Fi Television Series of All Time
V Elizabeth Mitchell, Morris Chestnut, Joel Gretsch

27
3,099 2,643
Sliders is listed (or ranked) 27 on the list The Best Sci Fi Television Series of All Time
Sliders Jerry O'Connell, Sabrina Lloyd, John Rhys-Davies

28
2,763 1,136
The Expanse is listed (or ranked) 28 on the list The Best Sci Fi Television Series of All Time
The Expanse Shohreh Aghdashloo, Cas Anvar, Wes Chatham

29
3,291 3,022
Terminator: The Sarah Connor C... is listed (or ranked) 29 on the list The Best Sci Fi Television Series of All Time
Terminator: The Sarah Connor Chronicles Lena Headey, Thomas Dekker, Summer Glau

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30
2,373 1,939
The Hitchhiker's Guide to the ... is listed (or ranked) 30 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

31
3,019 2,718
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
1,847 1,180
Agents of S.H.I.E.L.D. is listed (or ranked) 32 on the list The Best Sci Fi Television Series of All Time
nymless added Agents of S.H.I.E.L.D. Clark Gregg, Ming-Na Wen, Brett Dalton

33
2,539 2,813
Dollhouse is listed (or ranked) 33 on the list The Best Sci Fi Television Series of All Time
Dollhouse Eliza Dushku, Harry Lennix, Fran Kranz

34
2,206 1,905
Buck Rogers in the 25th Centur... is listed (or ranked) 34 on the list The Best Sci Fi Television Series of All Time
huggums537 added Buck Rogers in the 25th Century Gil Gerard, Erin Gray, Felix Silla

35
2,679 2,397
Falling Skies is listed (or ranked) 35 on the list The Best Sci Fi Television Series of All Time
dustman025 added Falling Skies Noah Wyle, Drew Roy, Maxim Knight

36
2,303 2,279
Continuum is listed (or ranked) 36 on the list The Best Sci Fi Television Series of All Time
toddrh added Continuum Rachel Nichols, Stephen Lobo, Victor Webster

37
2,633 2,443
Xena: Warrior Princess is listed (or ranked) 37 on the list The Best Sci Fi Television Series of All Time
Xena: Warrior Princess Lucy Lawless, Renée O'Connor, Ted Raimi

38
2,271 2,647
Space: 1999 is listed (or ranked) 38 on the list The Best Sci Fi Television Series of All Time
Space: 1999 Martin Landau, Barbara Bain, Nick Tate

39
2,195 2,295
The Six Million Dollar Man is listed (or ranked) 39 on the list The Best Sci Fi Television Series of All Time
The Six Million Dollar Man Lee Majors, Richard Anderson, Martin E. Brooks

40
1,138 710
Dark Matter is listed (or ranked) 40 on the list The Best Sci Fi Television Series of All Time
Dark Matter Marc Bendavid, Melissa O'Neil, Anthony Lemke

41
2,453 2,425
Dark Angel is listed (or ranked) 41 on the list The Best Sci Fi Television Series of All Time
Dark Angel Jessica Alba, Michael Weatherly, Richard Gunn

42
2,311 2,420
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
2,038 1,890
Dune is listed (or ranked) 43 on the list The Best Sci Fi Television Series of All Time
Dune William Hurt, Alec Newman, Giancarlo Giannini

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44
1,683 1,239
The Flash is listed (or ranked) 44 on the list The Best Sci Fi Television Series of All Time
The Flash Grant Gustin, Candice Patton, Danielle Panabaker

45
2,068 1,754
Highlander: The Series is listed (or ranked) 45 on the list The Best Sci Fi Television Series of All Time
wiabux added Highlander: The Series Adrian Paul, Stan Kirsch, Jim Byrnes

46
1,199 691
Daredevil is listed (or ranked) 46 on the list The Best Sci Fi Television Series of All Time
nymless added Daredevil Charlie Cox, Vincent D'Onofrio, Deborah Ann Woll

47
1,157 720
Jessica Jones is listed (or ranked) 47 on the list The Best Sci Fi Television Series of All Time
nymless added Jessica Jones Krysten Ritter, Rachael Taylor, Eka Darville

48
1,091 929
Sense8 is listed (or ranked) 48 on the list The Best Sci Fi Television Series of All Time
Anna Åhlin added Sense8 Aml Ameen, Doona Bae, Jamie Clayton

49
1,976 2,081
Lost in Space is listed (or ranked) 49 on the list The Best Sci Fi Television Series of All Time
Lost in Space Guy Williams, June Lockhart, Mark Goddard

50
2,289 2,269
3rd Rock from the Sun is listed (or ranked) 50 on the list The Best Sci Fi Television Series of All Time
3rd Rock from the Sun John Lithgow, Jane Curtin, Kristen Johnston