He wrote for, produced, and starred in "The Dave Thomas Comedy Show" (1990). In 1991, he starred in the Showtime comedy, "Public Enemy #2". In 1992, he tried his hand at reality TV and co-executive produced ABC's "America's Funniest People" with Vin Di Bona, but left after thirteen weeks to appear in the film "Coneheads". In 1993, he officially co-starred in ABC's "Grace Under Fire" with Brett Butler and Tom Poston and continued with the show for 5 seasons. In 1995 Thomas starred in ABC TV movie "Picture Perfect" with Mary Page Keller and Richard Karn. In 1995 Thomas tried his hand at TV Game shows, produced a pilot of a game show called Family Challenge for ABC. When ABC did not pick up the series, Thomas sold Family Challenge to the (Family Channel) where he produced 144 episodes of the show spread over 2 seasons. In 1996, Thomas played the title role in the Fox TV movie "Mr. Foster's Field Trip" aka "Kidz in the Wood" with Julia Duffy. In 1996, he wrote the book "SCTV: Behind the Scenes" (McClelland & Stewart, publishers). From 1999-2002, he voiced various roles on the animated series "Mission Hill". He also voiced Rex Banner in the Simpsons.