Alien Encounters

A users' guide to the cosmos, from the Big Bang to galaxies, stars, planets and moons: where did it all come from and how does it all fit together? A primer for anyone who has ever looked up at the night sky and wondered.

Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.

Investigates a wide range of historically compelling topics and the mysteries surrounding each including the Titanic, D.B. Cooper, Roswell, John Wilkes Booth, and more. Fresh, new evidence and perspectives will be showcased, such as never-before-released documents, personal diaries and DNA evidence.

Eerie encounters, bizarre disappearances, haunting events and more perplexing phenomena are explored in this chilling investigative docuseries.