Continuity mistake: There are a couple of continuity errors in the dance scene: First, the 4 girls sitting across from the boys switch positions from one shot to the next, then the last girl (long dark hair) disappears from the row of girls entirely, only to show up on the dance floor later in the scene. She was across from (and should have been paired up with) Beaver; instead, the teacher nods toward a now-empty chair and remarks that they "ran out of girls". (00:08:00)
Leave It To Beaver (1957)
1 continuity mistake in Beaver's Dance - chronological order
Starring: Barbara Billingsley, Hugh Beaumont, Jerry Mathers, Tony Dow
Wally's Practical Joke - S6-E35
Visible crew/equipment: When Eddie Haskell comes over to scheme getting back at Lumpy, just as Eddie, Wally and Beaver are heading up the stairs, a mike boom is visible in the upper left corner.
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.
Captain Jack - S1-E3
Trivia: The gentleman at the alligator farm is the same one who plays Uncle Billy later on.