Irwin Allen
Colbert's agent arranged a meeting with Irwin Allen. In 1966-1967, Colbert played the part of Doug Phillips in thirty episodes of the Irwin Allen science fiction ABC series, "The Time Tunnel", the second lead in a show about two time travelers. James Darren and Lee Meriwether starred with Colbert. Historical events like the Alamo, the "Titanic", Krakatoa, and Custer's last stand were fictionalized. Colbert later starred in a 1970 unsuccessful television pilot for Allen entitled "City Beneath the Sea" that was shown as a television movie.