When does It's About Time return?

It's About Time is an American science fantasy comedy TV series that aired on CBS for one season of 26 episodes in 1966–1967. The series was created by Sherwood Schwartz, and used sets, props and incidental music from Schwartz's other television series in production at the time, Gilligan's Island. Astronauts Mac McKenzie (Frank Aletter) and Hector Canfield (Jack Mullaney) travel faster than the speed of light, resulting in being sent back in time to prehistoric days.