The Munsters - Season 1 - Eps 20: Bats of a Feather
Eddie needs an impressive pet to take to the school pet fair, but Spot, the fire-breathing monster, is too shy to come out of hiding. Eddie decides to take Igor the bat, but Igor is insulted by one of Herman’s wisecracks and flies away. Without Eddie’s knowing, Grandpa changes himself into a bat to impersonate Igor. This causes trouble when Eddie gives Grandpa to another student whose father wants to send him to outer space on a scientific mission.
About The Munsters

Title: The Munsters
First Air Date: 1964-09-24
Last Air Date: 1966-05-12
Status: Ended
Rating: 8/10 (from 428 votes)
Language: EN
Seasons: 3
Total Episodes: 70
Network: CBS
Genres: Comedy, Sci-Fi & Fantasy, Family
Production Companies: Universal Television, Kayro-Vue Productions, Universal Television Entertainment
Synopsis
A family of friendly monsters that have misadventures all while never quite understanding why people react to them so strangely.
Cast

Fred Gwynne
Herman Munster

Yvonne De Carlo
Lily Munster

Butch Patrick
Eddie Munster

Al Lewis
Grandpa

Pat Priest
Marilyn Munster