Bill Day investigates unknown creatures
1 Episodes
Himself
Based on this show
Prehistoric Planet
History's Greatest Mysteries
MythBusters
Super/Natural
Top Secret UFO Projects Declassified
Walking with Dinosaurs
The UnBelievable with Dan Aykroyd
Explained
Hangar 1: The UFO Files
Life on Our Planet
Animal
Planet Earth
Encounters
Earth at Night in Colour
Ancient Aliens
True Haunting
Savage Kingdom
In Search of...
America's Book of Secrets
David Attenborough's Natural Curiosities
Shows like this one
UFOs: Investigating the Unknown
Expedition Bigfoot
UFOs Declassified
Ummo: La España alienígena
The Secret of Skinwalker Ranch
America: Facts vs. Fiction
L’or : luxe, épopées et légendes
Unsolved Mysteries
Destination Truth
UFO-mysteriet med Felix Herngren
Heaven's Gate: The Cult of Cults
In Search of Aliens
The Proof Is Out There: Bermuda Triangle Edition
Greek Island Odyssey
Absurd Planet
UFO