Leave It to Beaver S05 E18 Beaver's Long Night

"Gee, Wally!"

Beaver has Gilbert over to spend the night but after they watch a gangster movie things get out of hand. A suspicious car has just pulled up to the front of the house with two strange characters sitting inside, and they just happen to be Lumpy and Bill, dressed for a masquerade party. Not knowing this, Beaver calls the police and Lumpy and Bill are arrested.