Watchworthy

The Best Alien Documentary Series 

Ranker TV
Updated May 7, 2020 362 votes 187 voters 8.5k views 21 items

List Rules Vote 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.

Data-driven recommendations based on voting from over 40 million monthly visits to Ranker. Try the free app
list ordered by
1
UFOs: The Lost Evidence ... is listed (or ranked) 1 on the list The Best Alien Documentary Series
UFOs: The Lost Evidence Richard M. Dolan, Dave Rosenfeld, Mike Bara

Premiered: 2017

2
UFOs Declassified is listed (or ranked) 2 on the list The Best Alien Documentary Series
Brad Cartner, Leslie Kean, Nick Pope

Premiered: 2015

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.
3
Ancient Aliens is listed (or ranked) 3 on the list The Best Alien Documentary Series
Ancient Aliens Robert Clotworthy, Giorgio Tsoukalos, David Childress

Premiered: 2010

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 ...more
4
Unsealed: Alien Files is listed (or ranked) 4 on the list The Best Alien Documentary Series
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 ...more
5
Hangar 1: The UFO Files ... is listed (or ranked) 5 on the list The Best Alien Documentary Series
Hangar 1: The UFO Files

Premiered: 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 ...more
6
In Search of Aliens is listed (or ranked) 6 on the list The Best Alien Documentary Series
In Search of Aliens Giorgio Tsoukalos

Premiered: 2014

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
7
The World's Strangest UF... is listed (or ranked) 7 on the list The Best Alien Documentary Series
The World's Strangest UFO Stories
The World's Strangest UFO Stories is a tv documentary mini series.
8
Encounters is listed (or ranked) 8 on the list The Best Alien Documentary Series
Encounters

Premiered: 1994

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
9
Shaun Ryder On UFOs is listed (or ranked) 9 on the list The Best Alien Documentary Series
Shaun Ryder On UFOs Shaun Ryder

Premiered: 2013

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
10
Alien Mysteries is listed (or ranked) 10 on the list The Best Alien Documentary Series
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
11
Mysteries Decoded is listed (or ranked) 11 on the list The Best Alien Documentary Series
Jennifer Marshall

Premiered: 2019

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 ...more
12
Sightings is listed (or ranked) 12 on the list The Best Alien Documentary Series
Christopher Chacon, Dale Timothy White, James A. Swan

Premiered: 1992

Sightings (Syfy, 1992) is an American paranormal and news television series. The show reports on eyewitness sightings of ghosts, UFOs, and other strange occurrences.
13
Secrets & Mysteries ... is listed (or ranked) 13 on the list The Best Alien Documentary Series
Edward Mulhare

Premiered: 1988

Secrets & Mysteries was a television series which originally aired in syndication from 1988 to 1989. It was hosted by acclaimed Irish actor Edward Mulhare and dealt with topics of a ...more
14
UFO Files is listed (or ranked) 14 on the list The Best Alien Documentary Series
Burton Richardson, Stanton Friedman, William J. Birnes

Premiered: 2004

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 ...more
15
Steps to the Future is listed (or ranked) 15 on the list The Best Alien Documentary Series
Steps to the Future
Steps to the Future (2010) is a French documentary television series.
16
Space Odyssey is listed (or ranked) 16 on the list The Best Alien Documentary Series
David Suchet, Michelle Joseph, Mark Tandy

Premiered: 2004

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 ...more
17
UFO Diaries is listed (or ranked) 17 on the list The Best Alien Documentary Series
UFO Diaries Charles E. Sellier Jr., Vicki Cooper-Ecker, Kevin D. Randle
18
Indians + Aliens I is listed (or ranked) 18 on the list The Best Alien Documentary Series
Indians + Aliens I
19
Chasing UFOs is listed (or ranked) 19 on the list The Best Alien Documentary Series
Ben McGee, Erin Ryder, James Fox

Premiered: 2012

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 ...more
20
UFO Hunters is listed (or ranked) 20 on the list The Best Alien Documentary Series
William J. Birnes, Patrick Uskert, Ted Acworth

Premiered: 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 ...more
21
Indians + Aliens II is listed (or ranked) 21 on the list The Best Alien Documentary Series
Indians + Aliens II