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The Best Sci-Fi Television Series Of All Time

Updated February 19, 2021 1.2m votes 65.0k voters 830.4k views300 items

List RulesVote up the best sci-fi TV shows and series with strong 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.

Are you a sci-fi fan? Check out this list of current sci-fi shows to watch. 

 

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  • Firefly1
    22,775
    9,501

    Firefly

    Nathan Fillion, Gina Torres

    Premiered2002

    NetworkFox Broadcasting Company

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  • Star Trek: The Next Generation2
    16,323
    8,413

    Star Trek: The Next Generation

    Patrick Stewart, Brent Spiner

    Premiered1987

    NetworkCBS

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  • Stargate SG-13
    14,908
    7,270

    Stargate SG-1

    Richard Dean Anderson, Michael Shanks

    Premiered1997

    NetworkShowtime, Syfy

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    #3 of 82 The Best Syfy Original Shows#17 of 48 The Best Showtime Shows of All Time, Ranked

  • Battlestar Galactica4
    16,553
    9,383

    Battlestar Galactica

    Edward James Olmos, Mary McDonnell

    Premiered2004

    NetworkSyfy

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  • Doctor Who5
    15,063
    9,175

    Doctor Who

    Christopher Eccleston, David Tennant

    Premiered1963

    NetworkBritish Broadcasting Corporation, BBC America, BBC One, S4C, BBC HD

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  • Star Trek: Deep Space Nine6
    11,436
    6,970

    Star Trek: Deep Space Nine

    Avery Brooks, Rene Auberjonois

    Premiered1993

    NetworkUPN

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    #205 of 220 The Greatest TV Shows for Women#101 of 253 The Best TV Shows Streaming On Hulu

  • Star Trek: The Original Series7
    12,436
    7,636

    Star Trek: The Original Series

    William Shatner, Leonard Nimoy

    Premiered1966

    NetworkNBC

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    #33 of 70 The Best Crime Fighting Duo TV Series#9 of 14 The Most Destructive Sci-Fi Superweapons Of All Time

  • Star Trek: Voyager8
    10,591
    6,464

    Star Trek: Voyager

    Kate Mulgrew, Robert Beltran

    Premiered1995

    NetworkUPN

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    #45 of 283 The Best Female-Led TV Shows#8 of 22 All 22 Star Trek Series & Movies, Ranked by Trekkies

  • The X-Files9
    12,757
    7,897

    The X-Files

    David Duchovny, Gillian Anderson

    Premiered1993

    NetworkFox Broadcasting Company

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  • The Twilight Zone10
    10,282
    6,514

    The Twilight Zone

    Rod Serling, Robert McCord

    Premiered1959

    NetworkUPN, CBS

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    Small Details From 'The Twilight Zone' That Make The Show Much Better#10 of 201 The TV Shows with the Best Writing

  • The Expanse11
    10,734
    4,456

    The Expanse

    Thomas Jane, Steven Strait

    Premiered2015

    NetworkSyfy

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  • Stargate Atlantis12
    9,829
    6,195

    Stargate Atlantis

    Joe Flanigan, Rachel Luttrell

    Premiered2004

    NetworkSyfy

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    Amazon buy button

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    #46 of 129 Canceled Shows We'd Most Like to See as Movies#25 of 125 The Best Action-Adventure TV Shows

  • Farscape13
    10,879
    7,012

    Farscape

    Ben Browder, Claudia Black

    Premiered1999

    NetworkSyfy, Nine Network

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    The Best Farscape Characters#60 of 94 TV Shows You Wish You Were A Character On

  • Futurama14
    9,673
    6,571

    Futurama

    Billy West, John DiMaggio

    Premiered1999

    NetworkComedy Central, Fox Broadcasting Company

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  • Star Trek: Enterprise15
    8,872
    5,916

    Star Trek: Enterprise

    Scott Bakula, John Billingsley

    Premiered2001

    NetworkUPN

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    #18 of 32 The Best UPN Shows#6 of 19 The Best Current TV Shows About Space

  • Quantum Leap16
    8,612
    5,792

    Quantum Leap

    Scott Bakula, Dean Stockwell

    Premiered1989

    NetworkNBC

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    #9 of 140 The Worst TV Series Finales Ever#10 of 89 The Best 1980s Primetime TV Shows

  • Babylon 517
    12,003
    8,221

    Babylon 5

    Jerry Doyle, Mira Furlan

    Premiered1994

    NetworkPrime Time Entertainment Network, TNT

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  • Fringe18
    10,224
    7,012

    Fringe

    Anna Torv, Joshua Jackson

    Premiered2008

    NetworkFox

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  • Warehouse 1319
    7,441
    5,307

    Warehouse 13

    Eddie McClintock, Joanne Kelly

    Premiered2009

    NetworkSyfy

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    The Best Seasons of Warehouse 13#1 of 20 The Most Underrated Sci-Fi TV Shows Of The 2010s

  • Battlestar Galactica20
    8,158
    5,566

    Battlestar Galactica

    Edward James Olmos, Mary McDonnell

    Premiered1978

    NetworkAmerican Broadcasting Company

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    #7 of 307 The Best Shows Canceled After a Single Season#147 of 508 The Best TV Theme Songs of All Time

  • Stranger Things21
    6,636
    2,427

    Stranger Things

    Winona Ryder, David Harbour

    Premiered2016

    NetworkNetflix

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  • Eureka22
    8,050
    5,771

    Eureka

    Colin Ferguson, Salli Richardson-Whitfield

    Premiered2006

    NetworkSyfy

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    #229 of 640 The Best TV Shows To Binge Watch#112 of 160 Shows With The Best Freakin' Series Finales Of All Time

  • Red Dwarf23
    6,514
    5,099

    Red Dwarf

    Chris Barrie, Craig Charles

    Premiered1988

    NetworkBritish Broadcasting Corporation, Dave

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    #222 of 308 The Greatest Sitcoms in Television History#256 of 448 The Funniest TV Shows of All Time

  • Torchwood24
    7,169
    5,948

    Torchwood

    John Barrowman, Eve Myles

    Premiered2006

    NetworkBritish Broadcasting Corporation, BBC One, Starz, BBC HD, BBC Three

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    #4 of 38 The Very Best British Sci Fi Shows, Ranked#27 of 34 The Best Sci-Fi & Fantasy Shows On HBO Max

  • Agents of S.H.I.E.L.D.25
    5,887
    4,258

    Agents of S.H.I.E.L.D.

    Clark Gregg, Ming-Na Wen

    Premiered2013

    NetworkABC

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