The Munsters (1964)

S2E24 The Musician

With Grandpa's enchanting magic, Eddie evolves from a mediocre trumpet player into a classical music prodigy. However, as he prepares for a crucial performance for Herman's boss, he finds himself in a bind when Grandpa forgets the precise potion recipe. In a twist of fate, Eddie inadvertently becomes a jazz-playing, jive-talking hipster, leading to unexpected challenges and comedic moments as he navigates his new musical identity.