The Muppet Show Season 4 Episode 20 Alan Arkin 1979
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Alan accidentally drinks Bunsen Honeydew's Jekyll-and-Hyde potion, and turns into a rampaging monster. He runs amuck, as the ultra-cute Bun-Bun Brothers sing "Zip-A-Dee-Doo-Dah." When Kermit catches Alan in a net, he turns back into himself. Soon, Kermit takes a sip of the potion himself.
- Released: 1980-03-07
- Runtime: 26 minutes
- Genre: Kids, Comedy, Family
- Stars: Jim Henson, Frank Oz, Jerry Nelson, Dave Goelz, Richard Hunt
- Director: Jim Henson, Jack Burns, David Lazer
