This episode has the last dream sequence of the series. There were seventeen in all because there were four in "St. Gilligan and the Dragon". It is the fourteenth episode with a dream sequence.
The Professor, before Skipper and Gilligan bring another tablet, says he needs 8 more, meaning nine, but then after he has 3 of them, he says 7 more instead of 6. 7+3=10, not 9.
Mrs. Howell: I once put together a puzzle that had 800 pieces. And I only used 500 of them!
Caveman Skipper: Is very cold on other side of hill. Gilligan say they have thing called snow.
Cavewoman Ginger: What is snow?
Caveman Skipper: Is white lumpy rain.
Caveman Gilligan: Professor invent wheel - Professor say most important invention take on trip.
Caveman Skipper: Professor wrong! Skipper know most important invention take on trip... women!
Caveman Gilligan: I go Professor now. I go get wheel.
Caveman Skipper: I get women!
Theme of episode: Reading is important, but it's even more important to understand what you're reading.
This episode enabled Sherwood to use some of the sets from his other show that was currently on CBS, "Its About Time" about two astronauts that went back to the Stone Age.