Uncle Deadly is a blue, reptilian-looking monster, also known as the Phantom of The Muppet Show. In The Muppets: The Movie Junior Novel, he's described as a dragon. Early concept artwork depicts the character as a gargoyle-like creature.
Although he made his first appearance alongside Vincent Price on episode 119 of The Muppet Show, Uncle Deadly didn't get his proper introduction until episode 121. One by one, the Muppets tell Kermit that they have seen a phantom, but Kermit refuses to believe them until he sees Uncle Deadly with his own eyes. Once revealed, Uncle Deadly explains that he used to perform at the Muppet Theater, where he once played his most difficult role, Othello, and on opening night he was killed... by the critics.
Uncle Deadly sang a handful of songs on the show, including singing a bar of "You're Just in Love" with Ethel Merman and "Sheik of Araby" and performed in the Muppet Melodrama sketches with Miss Piggy and Wayne in season 3. Although he didn't have a major role in most of the Muppet movies, Uncle Deadly did appear in the final group scenes at the end of The Muppet Movie and The Muppets Take Manhattan. He also appeared on The Tonight Show in 1979 when Kermit the Frog hosted.
In the December 2000 issue of the Writers' Guild magazine "Written By," which featured interviews with Muppet writers Jim Lewis, Kirk Thatcher and John Derevlany, it was mentioned that one of the projects Thatcher had in development was a silly Goosebumps-type TV show called "Uncle Deadly's House of Badness". The project never got off the ground, and it's unknown if a pilot was filmed or if a script was even completed.
After over 20 years of absence, Uncle Deadly will be returning in 2011's The Muppets (performed by Matt Vogel), as the "sinister second-in-command" to Tex Richman. In an interview, Uncle Deadly explained that in his spare time, he had been haunting Stage 28, switching every other day with The Phantom of the Opera (both of whom took weekends off; "even a phantom must rest").
- The Muppet Show
- "The Muppet Show Theme" (Seasons 2 - 5)
- episode 119 ("House of Horror sketch", "You've Got a Friend", Backstage, Goodnight)
- episode 121 (Backstage, Goodnight)
- episode 122 ("You're Just in Love", "Mutual Admiration Society", Goodnight)
- episode 207 ("Consider Yourself" Goodnight)
- episode 212 ("Sheik of Araby")
- episode 217 ("I Whistle a Happy Tune")
- episode 304 (Muppet Melodrama, Goodnight)
- episode 306 (Muppet Melodrama)
- episode 308 (Opening)
- The Tonight Show
- The Muppet Movie (The Rainbow Connection finale)
- The Muppets Take Manhattan (Wedding Finale)
- The Muppets: A Celebration of 30 Years
- The Muppets at Walt Disney World (introduction with Michael Eisner)
- The Muppet Show Theme Music Video
- The Muppets and press kit interviews
- The Muppet Show Book
- Fozzie's Big Book of Sidesplitting Jokes
- Jim Henson's Muppet Show Bill
- Muppet Magazine issue 4
- The Muppet Show Comic Book
- issue #1, "Kermit's Story"
- issue #3, "Gonzo's Story"
- Muppet Robin Hood - issue #2
- The Treasure of Peg-Leg Wilson - issue #3
- Muppet Snow White