Matt Damon as Mark Whitacre
Melanie Lynskey as Ginger Whitacre
Thom as F. Wilson
Tony Hale
Patton Oswalt as Ed Herbst
Frank Welker as Mr. Whitacre
Scott Bakula as Brian Shepard
Elena Eustache as Swiss secretary
Mike O'Malley
Joel McHale as Robert Herndon
Rusty Schwimmer as Elizabeth
Candy Clark as Mrs. Whitacre
Eddie Jemison as Kirk Schmidt
Scott Adsit as Sid Hulse
Paul F. Tompkins as D'Angelo
Richard Steven Horvitz as Bob Zaideman
Arden Myrin as Sarah Scott
Andrew Daly
Ludger Pistor as Reinhard Richter
Rick Overton as Terry Wilson
Tom Papa as Mick Andre
Adam Paul
Larry Clarke as Bill Walker
Don Kress as Federal Plaza Lawyer
Gene Fojtik as Lawyer
Raymond Ma as Mimoto
Joseph Cintron as FBI Agent
Allan Havey as Spcl. Agt. Dean Paisley
Joseph Mazurk as Federal Plaza Lawyer
Daniel Hagen as Scott Roberts
Hans Tester as Peter Dreyer
Bil Dwyer as Lawyer
Joshua Funk as Agent Grant
Jayden Lund as James Mutchnik
Giota Trak as
Michael C. McCarthy as Scott Kilman
Lindsey Trout as Waitress
Rome Kanda as Ikeda
Stephen Sepher as Office Manager
Steve Seagren as Correctional Officer
Jean-Pierre Gillain as Swiss porter
Samantha Albert as Mary Spearing
Tim Cain as Himself
Kathy Hanner as Waitress
Howie Johnson as Rusty
Jimmy Brogan as Psychiatrist
Craig Ricci Shaynak as Discouraged Foreman
Brian Gallivan as Ronald Henkoff
Mark Herzog as News Reporter
Sean Streaty as Himself
Matthew Francis as FBI Agent
Scott England as Himself
Patricia Kakrid as
Adam Paul