Visible crew/equipment: When Ward joins June in the kitchen he asks what's up with Wally, and his actor's mark is visible on the floor, then as June walks away, her T-mark becomes visible on the floor as well. (00:06:00)
Leave It To Beaver (1957)
1 mistake in Wally's Present
Starring: Barbara Billingsley, Hugh Beaumont, Jerry Mathers, Tony Dow
June Cleaver: Dear, do you think all parents have this much trouble?
Ward Cleaver: No, just parents with children.
Captain Jack - S1-E3
Trivia: The episode "Captain Jack" was the first time a toilet was shown on TV; the boys buy a baby alligator and Wally is shown putting it in the toilet tank. The network censors were so spooked by the thought of showing a toilet on television that they delayed the episode. And when the censors finally relented, the compromise allowed only the toilet tank to be shown, not the bowl.