Visible crew/equipment: When Beaver's class takes the intelligence test, a chalk T-mark is visible on the floor between the wall and Judy's desk. (00:09:40)
Leave It To Beaver (1957)
1 mistake in Part Time Genius
Starring: Barbara Billingsley, Hugh Beaumont, Jerry Mathers, Tony Dow
Eddie Haskell: Look Sam, if you can make the other guy feel like a goon first, then you don't feel like so much of a goon.
Wally Cleaver: I don't get that.
Eddie Haskell: Of course you don't. That's because you never went to kindergarten with a home permanent.
Trivia: Phyllis Coates, who plays the new neighbor Mrs. Donaldson, played Lois Lane in the first season of the Superman TV series in the 1950s.