The Time Tunnel is an American color science fiction TV series written around a theme of time travel. The show was creator-producer Irwin Allen's third science-fiction television series. It ran for one season of 30 episodes from 1966 to 1967. The series is set in 1968, two years into the future from the actual broadcast season.
The series is set in 1968, two years into the future from the actual broadcast season, 1966-67. Project Tic-Toc is a top-secret U.S. government effort to build an experimental time machine. The base for the project is a huge underground complex in Arizona.