12. “It’s About Time”

This not-so-precious gem ran for one season, from 1966-67. From Sherwood Schwarz, the “Gilligan’s Island” guy, “It’s About Time” sent a pair of astronauts through the time barrier in a tin-can capsule, all the way back to prehistoric times. Here’s why the sitcom is on this list: 1) The caveman Gronk was played by -- “ooh, ooh” -- Joe E. Ross from “Car 54, Where Are You?” 2) Gronk’s wife Shag (later changed to Shad, when the show figured out the double meaning) was played by the insane Imogene Coca (pictured here in 1977). And 3) The writers switched up the entire series mid-season, and sent the cave people to the 1960s with the astronauts. Talk about your “Lost”-style game changers.