Watch Series: Threshold Released in (2005) - Season 1 produced by USA, UK, The TV Series categorized in Action, Adventure, Drama, Fantasy, Science-Fiction, Thriller, and content rating TV-14 with duration 41 min broadcasted as these networks CBS, Streamed at Putlocker & directed by Bragi Schut, John F. Showalter, Norberto Barba, Bill Eagles. Threshold was a science fiction drama television series that first aired on CBS in September 2005. Produced by Brannon Braga, David S. Goyer and David Heyman, the series focuses on a secret government project investigating the first contact with an extraterrestrial species. - Season 1