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65.5k voters

The Best Sci-Fi Television Series Of All Time

Updated May 13, 2021 1.1m votes 65.5k voters 835.9k views282 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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  • 1
    22,365
    9,397

    Firefly

    Jewel Staite, Adam Baldwin

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  • 2
    16,039
    8,308

    Star Trek: The Next Generation

    LeVar Burton, Diana Muldaur

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  • 3
    16,296
    9,219

    Battlestar Galactica

    James Callis, Kandyse McClure

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  • 4
    14,693
    7,168

    Stargate SG-1

    Beau Bridges, Amanda Tapping

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    #4 of 84 The Best Syfy Original Shows#5 of 85 The Best TV Shows Based on Movies

  • 5
    14,802
    9,040

    Doctor Who

    Christopher Eccleston, David Tennant

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  • 6
    11,255
    6,876

    Star Trek: Deep Space Nine

    Nicole de Boer, Colm Meaney

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  • 7
    10,430
    6,372

    Star Trek: Voyager

    Robert Picardo, Ethan Phillips

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  • 8
    12,257
    7,513

    Star Trek: The Original Series

    George Takei, Nichelle Nichols

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  • 9
    12,581
    7,746

    The X-Files

    Chris Owens, Jerry Hardin

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  • 10
    10,602
    4,397

    The Expanse

    Thomas Jane, Steven Strait

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  • 11
    10,144
    6,393

    The Twilight Zone

    Rod Serling, Robert McCord

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  • 12
    9,660
    6,089

    Stargate Atlantis

    Jewel Staite, Jason Momoa

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    #47 of 129 Canceled Shows We'd Most Like to See as Movies#26 of 119 The Best TV Shows That Never Got a Real Finale

  • 13
    10,699
    6,878

    Farscape

    Claudia Black, Paul Goddard

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  • 14
    8,750
    5,804

    Star Trek: Enterprise

    Connor Trinneer, Anthony Montgomery

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  • 15
    8,469
    5,689

    Quantum Leap

    Carolyn Seymour, Dennis Wolfberg

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  • 16
    9,511
    6,463

    Futurama

    Billy West, John DiMaggio

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  • 17
    11,851
    8,096

    Babylon 5

    Jason Carter, Claudia Christian

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  • 18
    10,079
    6,888

    Fringe

    Kirk Acevedo, Lance Reddick

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  • 19
    8,027
    5,434

    Battlestar Galactica

    Maren Jensen, Tony Swartz

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    #56 of 538 TV Shows Canceled Before Their Time#6 of 312 The Best Shows Canceled After a Single Season

  • 20
    7,310
    5,216

    Warehouse 13

    Aaron Ashmore, Joanne Kelly

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  • 21
    6,526
    2,424

    Stranger Things

    Winona Ryder, David Harbour

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  • 22
    7,910
    5,671

    Eureka

    Erica Cerra, Ed Quinn

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  • 23
    6,430
    5,009

    Red Dwarf

    Chris Barrie, Danny John-Jules

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    #223 of 293 The Greatest Sitcoms in Television History#234 of 389 TV Shows That Only Smart People Appreciate

  • 24
    7,043
    5,849

    Torchwood

    John Barrowman, Eve Myles

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    #33 of 240 The Best BBC One Shows#196 of 312 The Best TV Shows You Can Watch On HBO Max

  • 25
    5,752
    4,192

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

    Clark Gregg, Ming-Na Wen

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