- (Fall of 1999) Tom performed on stage in the off-Broadway comedy, "The Country Club", by Douglas Carter Beane. Tom's character, "Zip", is a philandering real estate salesman who has an affair with his best friend's wife.
- (January 2003) : Played "Gary" in "Turnaround", a play by Roger Kumble (Coast Playhouse, West Hollywood, California, USA).
- (September 2005) : Played "Gimpty" in "Dead End", a play by Sidney Kingsley (Ahmanson Theatre, Los Angeles, California, USA).
- (October 26, 2006 - February 18, 2007) "The Little Dog Laughed" written by Douglas Carter Beane; directed by Scott Ellis; original music by Lewis Flinn; with Johnny Galecki (as Alex); Julie White (as Diane); Tom Everett Scott (as Mitchell); Ari Graynor and Zoe Lister-Jones (as Zoe Lister-Jones) (as Ellen); on Broadway at the Cort Theatre in Manhattan, New York City, New York for 134 performances (including 22 previews beginning October 26, 2006).