The Flintstones (1960)

S1E14 The Prowler

With a thief prowling around Bedrock, Betty opts to enroll in judo classes for self-defense. When Wilma expresses interest in joining her, Fred mockingly dismisses the notion, claiming that she would be too frightened to face a burglar. To demonstrate his argument, Fred pretends to be the burglar and sneaks into the Rubble home, coincidentally on the same night the actual intruder arrives.