Matt Damon as Mark Whitacre

Scott Bakula as Brian Shepard

Joel McHale as Robert Herndon

Melanie Lynskey as Ginger Whitacre

Tom Papa as Mick Andreas

Rick Overton as Terry Wilson

Thomas F. Wilson as Mark Cheviron

Clancy Brown as Aubrey Daniel

Tony Hale as James Epstein

Richard Steven Horvitz as Bob Zaiderman

Ann Cusack as Robin Mann

Allan Havey as FBI Supervisor Dean Paisley

Rusty Schwimmer as Liz Taylor

Lucas McHugh Carroll as Alexander Whitacre

Eddie Jemison as Kirk Schmidt

Craig Ricci Shaynak as Discouraged Foreman

Scott Adsit as Sid Hulse

Ann Dowd as Kate Medford

Howie Johnson as Rusty Williams

Nick Craig as Kid at Pool #1

Cody Puckett as Kid at Pool #2

Andy Daly as Marty Allison

David Campbell as Budweiser Client Representative

Carolyn R. Feltner as Budweiser Receptionist

J.P. Gillain as Zurich Bank Security Officer

Elena Eustache as Zurich Bank Receptionist

John Hans Tester as Peter Dreyer

Ludger Pistor as Reinhard Richter

Rome Kanda as Hirokazu Ikeda

Yoshio Be as Kazutoshi Yamada

Raymond Ma as Kanji Mimoto

Hervé Deschamps as Philippe Rollier

Pascal Ifri as Alain Crouy

Dann Seki as Joon Mo Suh

Jayden Lund as James Mutchnik

Chic Daniel as FBI Agent at Raid

Joe Chrest as Visiting Client

J.D. Mathein as Phone Agent

William Marsh as FBI Special Agent Ken Temples

Tom Smothers as Dwayne Andreas

Bob Zany as John Dowd

Tara Barrett as Reporter #1

Tim Cain as Reporter #2

Ken Frye as Reporter #3

Huey Freeman as Reporter #4

Brian Gallivan as Ron Henkoff

Daniel Hagen as Scott Roberts

Patton Oswalt as Ed Herbst

Samantha Albert as Mary Spearing

Jimmy Brogan as Dr. Derek Miller

Paul F. Tompkins as FBI Special Agent Anthony D'Angelo

Adam Paul as FBI Special Agent Michael Bassett

Wayne Pére as Sheldon Zenner

Scott England as Local News Anchor

Joshua Funk as FBI Special Agent Robert Grant

Candy Clark as Mark Whitacre's Mother

Frank Welker as Mark Whitacre's Father

Larry Clarke as Whitacre's Second Attorney

Dick Smothers as Judge Harold Baker

Steve Seagren as Correctional Officer

Arden Myrin as Sarah Scott (uncredited)