"Who is What?" is the fifth segment of the eleventh episode of the first season and the seventy-fifth overall segment of The Flintstone Comedy Show (known as Flintstone Frolics), a spin-off of the original series, The Flintstones. It aired on January 31, 1981.
Fred dons a Dino costume to confuse Cavemouse. After encountering two Dinos, Cavemouse believes he's ill until he overhears Fred and Dino gloating about their plan. The mouse causes Fred and Dino to run into each other.
- Fly swatter
- Dino costume (only appearance)
- Cavemouse costume (only appearance)
- Food jars
|Henry Corden||Fred Flintstone|