[citation needed] Stewart toured in regional theatre for seven years before breaking into television with the role of Razor Dee, a spaced-out DJ on the final season of The New WKRP in Cincinnati in 1992.
He earned his Screen Actors Guild card while working for Hanna-Barbera's Shakey Quakey tour, but was later released for removing the head of his costume in front of children.
[2] In 1996, he was cast on 3rd Rock from the Sun, which lasted for six seasons, and where Stewart was noted for his talents at physical comedy and his characteristic "squinting" facial expression.
He guest-starred in the "Run Away Runway" episode of Disney's animated series Phineas and Ferb as fashion designer Gaston Le Mode (2008).
[citation needed] Stewart produced and co-starred in the dual role of Queen Victoria and Sigmund Freud in Watson: The Last Great Tale of the Legendary Sherlock Holmes at the Sacred Fools Theater Company,[3] where he is a member, and was co-artistic director of its 2012–2013 season.