The Munsters

If a Martian Answers, Hang Up (1x18)

Air date: Jan 21, 1965

When Herman fools around with a ham radio in Grandpa's dungeon, he thinks he's contacted Martians. But he is actually speaking to two kids who are fooling around with walkie-talkies and just pretending to be Martians. The kids think Herman is also a kid, and a stupid one too.