Mark Thomas Valley (born December 24, 1964 in Ogdensburg, New York) is an actor best known for his roles in Boston Legal, Harry's Law, Fringe, Human Target, and Body of Proof.
Valley was previously a marine, serving in the Gulf War during Operation Desert Storm.
He has a daughter named Sherri and was previously married to his Fringe co-star, Anna Torv.
- The Innocent 1993 as Tunnel Technician
- The Siege as FBI agent Mike Johanssen
- Shrek the Third as Cyclops
- Zero Dark Thirty as C-130 Pilot
- Gun Shy as Ben Harding
- Stolen as Fletcher
- Batman: The Dark Knight Returns as Superman
- Days of Our Lives as Jack Deveraux
- Once and Again as Will Gluck (5 episodes)
- ER as Richard Lockhart (5 episodes)
- Keen Eddie as Detective Eddie Arlette
- Boston Legal as Brad Chase
- Fringe as John Scott
- Harry's Law as Oliver Richard
- Body of Proof as Tommy Sullivan
- Hawaii Five-0 as Special Agent Frank Zagar (1 episode)