Wayne Knight is a Guest Star as the voice of Heckler.

From the current character is Max the Cat from The Penguins of Madagascar in 2008 and Madagascar series in 2008 and beyond, Rick from Hot in Cleveland in 2010 and Jong from the upcoming Computer Generated Imagery television series Kung Fu Panda: Legends of Awesomeness in 2011.

From the original character is Dennis Nedry from Jurassic Park, Stan Podolak from Space Jam, John Correlli, Demetrius the Pot Maker from Hercules, Newman from Seinfeld, Zoot from My Favorite Martian, Tantor the Elephant from Tarzan, Al the Toy Collector and the Mascot Chicken Costume of Al's Toy Barn from Toy Story 2, Emperor Zurg from Buzz Lightyear of Star Command, Zack Mallozzi from Rat Race, Dojo Kanojo Cho from Xiaolin Showdown and Mr. Blik the Black Cat from Catscratch.

In 2011, he will appear in Torchwood: Miracle Day.

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