I've Got a Secret (1952) Season 11 Episode 551

Garry (to Dick Van Dyke): Do you remember the first joke you ever told?
Dick: Yeah, of course it was a pantomime act...I didn't tell one for a good many years but I remember the first joke I ever told in front of an audience.
Garry: Where was that?
Dick: It was at the Georgian Hotel in Santa Monica.
Garry: What was the joke?
Dick: You really...(starts laughing)
Garry: Well, I don't know, we'll have to find out....Well, what was the joke?
Dick: Did you hear about the owl who married a goat?
Garry: No! What happened to the owl that married the goat?
Dick: They had a Hoot-e-nanny!
(audience laughs, Henry Morgan gives a puzzled look at Dick)