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The Best Alien Documentary Series

Updated January 14, 2021 693 votes 277 voters 13.9k views26 items

List RulesVote up the best television documentaries and documentary-reality shows about aliens and UFOs.

The best documentaries about aliens are here to remind you that the truth is out there. The best alien and UFO documentary series ever shown on television offers enough evidence to suspend the disbelief of even the most skeptical audience. If you’ve been looking for the best alien documentaries to add some excitement to your TV nights, this list of the best alien and UFO documentary series of all time will help you figure out what needs to go into your queue.

Whether you’re a believer or not, alien documentary series are a great source of out-of-this-world stories. From the mysteries of history in Ancient Aliens to recent government secrets in UFOs Declassified, UFO and alien documentary shows examine the possibilities of life beyond Earth, mixing reenactment, file footage, and information from experts in the field.

Which shows do the best job sharing information about the possibility of extraterrestrial life? Vote up the best alien documentary shows and add any documentary series about aliens and UFOs that are missing. And if you love the extraterrestrial, be sure to check out these great alien tv shows.

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  • 1
    91
    25

    UFOs: The Lost Evidence

    Richard M. Dolan, Dave Rosenfeld

    Premiered2017

  • 2
    54
    20

    UFOs Declassified

    Brad Cartner, Leslie Kean

    Premiered2015

    UFOs Declassified (History, 2015) is a Canadian documentary television series. The program features declassified CIA and US Air Force documents pertaining to notable UFO reports....  more
  • 3
    39
    9

    Hangar 1: The UFO Files

    Yana Trofimova, Johnson Cooley

    PremieredFebruary 28, 2014

    Hangar 1: The UFO Files (H2, 2014) is an American documentary television series. MUFON (The Mutual UFO Network) provides files from their archives of UFO sightings as the basis for episodes of Hangar...  more
  • 4
    62
    37

    Ancient Aliens

    Giorgio Tsoukalos, Erich von Däniken

    PremieredMarch 8, 2009

    Ancient Aliens (History, 2010) is an American television series that presents hypotheses of ancient astronauts and proposes that historical texts, archaeology, and legends contain evidence of past...  more

    More 

    Best Seasons of Ancient Aliens#89 of 124 The Best Shows Currently On The Air

  • 5
    41
    18

    Unsealed: Alien Files

    In a recent poll, roughly 80% of Americans said that our government is hiding information regarding the existence of alien life. Then why is so little attention paid to reports of visitors from...
  • 6
    32
    11

    The World's Strangest UFO Stories

    The World's Strangest UFO Stories is a tv documentary mini series....
  • 7
    22
    9

    In Search of Aliens

    Giorgio Tsoukalos

    Premiered2014

    In Search of Aliens (H2, 2014) is an American documentary television series. The program follows Giorgio A. Tsoukalos, an ancient alien astronaut hypothesist and the leading contributor to the...  more
  • 8
    12
    0

    UFO Witness

    Ben Hansen

    PremieredJanuary 14, 2021

    UFO Witness (Discovery+, 2021) is an American reality television series. With unprecedented access to the archives of famed ufologist Dr. J. Allen Hynek, Ben Hansen unlocks the secrets of the past to...  more

    More UFO Witness 

    #117 of 369 The Best New TV Shows Of 2021#116 of 419 The Most Anticipated New TV Shows Of 2021

  • 9
    16
    5

    Alien Mysteries

    Alien Mysteries is a Canadian UFO documentary series featuring eyewitness testimony that is produced by Exploration Production Inc. for Discovery Channel. Alien Mysteries showcases the real life...  more
  • 10
    11
    0

    UFO Files

    Burton Richardson, Stanton Friedman

    PremieredJanuary 1, 1995

    UFO Files is an American television series that was produced from 2004 to 2007 for The History Channel. The program covers the phenomena of unidentified flying and submerged objects, close encounters...  more
  • 11
    10
    0

    Unidentified: Inside America's UFO Investigation

    Luis Elizondo, Bryan Bender

    Premiered2019

    Unidentified: Inside America's UFO Investigation (History, 2019) is a documentary TV series. Featuring former military counter-intelligence officer Luis Elizondo,the show focuses on US government's...  more

    More 

    #8 of 21 The Best Current History Shows#59 of 70 The Best Shows on The History Channel

  • 12
    14
    5

    Encounters

    Encounters: The Hidden Truth was an hour-long TV series that featured real-life stories of paranormal phenomena. The format featured a host and a team of reporters presenting 3 or 4 stories per...  more
  • 13
    10
    1

    Sightings

    Christopher Chacon, Dale Timothy White

    Premiered1992

    Sightings (Syfy, 1992) is an American paranormal and news television series. The show reports on eyewitness sightings of ghosts, UFOs, and other strange occurrences....  more

    More Sightings 

    #38 of 47 The Best Paranormal Reality Shows#32 of 94 The Best Paranormal TV Shows

  • 14
    2
    0

    Alien Worlds

    Sophie Okonedo

    PremieredDecember 2, 2020

    Alien Worlds (Netflix, 2020) is a British sci-fi documentary. The series blends science fact and fiction to imagine alien life on other planets....  more

    More Alien Worlds 

    #226 of 523 The Best New Netflix Original Series Of The Last Few Years#41 of 41 The Very Best British Sci Fi Shows, Ranked

  • 15
    11
    2

    The Secret of Skinwalker Ranch

    Travis Taylor, Erik Bard

    Premiered2020

    The Secret of Skinwalker Ranch (History Channel, 2020) is a horror non-fiction mystery television series created by Kevin Burns. A team of scientists and experts conduct a thorough search in one of...  more

    More The Secret of Skinwalker Ranch 

    #151 of 274 The Best New Reality TV Shows of the Last Few Years#202 of 219 The Best Reality Shows on TV Right Now

  • 16
    Heaven's Gate: The Cult of Cults (HBO Max, 2020) is an American documentary miniseries. The four episode series features never-before-seen footage and first-person accounts to explore the infamous...  more

    More Heaven's Gate: The Cult of Cults 

    #411 of 868 The Best Original Streaming Shows Of The Last Few Years#267 of 322 The Best TV Shows You Can Watch On HBO Max

  • 17
    13
    7

    Shaun Ryder On UFOs

    Shaun Ryder

    Premiered2013

    Shaun Ryder on UFOs (2013) is a British documentary television series. Host and ex-Happy Mondays frontman Shaun Ryder travels the world to meet others who were abducted, as he was at the age of 15....  more
  • 18
    0
    4

    Steps to the Future

    Steps to the Future (2010) is a French documentary television series....  more
  • 19
    10
    6

    UFO Diaries

    Charles E. Sellier Jr., Vicki Cooper-Ecker
  • 20
    9
    8

    UFO Hunters

    William J. Birnes, Patrick Uskert

    PremieredJanuary 30, 2008

    UFO Hunters is an American television series that premiered on January 30, 2008 on The History Channel, produced by Motion Picture Production Inc., and ran for three seasons. Jon Alon Walz was the...  more
  • 21
    5
    2

    Mysteries Decoded

    Jennifer Marshall

    Premiered2019

    Mysteries Decoded (The CW 2019) is an American documentary television series. This hour-long documentary series hosted by US Navy veteran Jennifer Marsall examines unsolved mysteries from Area 51 to...  more
  • 22
    8
    8

    Chasing UFOs

    Ben McGee, Erin Ryder

    Premiered2012

    Chasing UFOs (National Geographic Channel, 2012) is an American reality television series. Paranormal researcher Erin Ryder, Geologist Ben McGee and UFOlogist James Fox set out to uncover the truth...  more
  • 23
    6
    5

    Space Odyssey

    David Suchet, Michelle Joseph

    Premiered2004

    Space Odyssey: Voyage to the Planets is a fictional documentary about a manned voyage through the solar system. Space Odyssey premiered in 2004 and was made by the BBC. It was written and directed by...  more
  • 24
    7
    8

    Indians + Aliens II

  • 25
    4
    6

    Indians + Aliens I