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It is mankind's eternal question: are we alone in the universe? Adventurer and explorer Josh Gates sets off on a 50,000-mile, multi-continent quest to find the answer in Travel Channel's spellbinding four-week special event, . Gates' out-of-this-world mission takes him on an epic journey across North America, South America, Africa and Europe, searching for evidence of life beyond our planet and the truth behind longstanding extraterrestrial legends.

Watch the full Expedition Unknown: Hunt for Extraterrestrials movie online at no cost in high-definition (HD) quality. No downloads needed—simply click to play and experience the excitement with English subtitles included for your convenience.