Chris Cooper as Robert Hanssen

Ryan Phillippe as Eric O'Neill

Laura Linney as Kate Burroughs

Caroline Dhavernas as Juliana O'Neill

Gary Cole as Rich Garces

Dennis Haysbert as Dean Plesac

Kathleen Quinlan as Bonnie Hanssen

Bruce Davison as John O'Neill

Jonathan Watton as Geddes

Tom Barnett as Jim Olsen

Jonathan Potts as D.I.A. Suit

David Huband as Photographer

Catherine Burdon as Agent Nece

Scott Gibson as Agent Sherin

Courtenay J. Stevens as Agent Loper

Clare Stone as Lisa Hanssen

Jonathan Keltz as Greg Hanssen

Richard Fitzpatrick as Michael Rochford

Melissa Thomson as Jane

Craig Eldridge as Gene Connors

Jonathan Whittaker as Tim Bereznay

Reagan Pasternak as Beautiful Reporter

Mary Jo Deschanel as Vivian O'Neill

Elie Gemael as Libyan Man

Oula Boubkraoui as Libyan Wife

Chris Owens as Trunk Cataloguer

Jonathon Ruckman as SWAT Agent

Stan Coles as Father McKee

Bart Bedford as Information Center Manager

David Frisch as Agent Pack

Scott McCulloch as Director Louis Freeh

Mathew Lyons as Richard

Greg Campbell as Special Agent in Charge

David O'Neill as Man in Car

Guido Rossi as Latin Speaking Man at Church

John Ashcroft as Self (archive footage) (uncredited)

Paul D'Elia as D.C. Driver on Bridge (uncredited)

Aaron Michael Lacey as FBI Agent (uncredited)

Mike Monroe as D.C. Police Officer (uncredited)

Talia Russo as Woman on Cell Phone (uncredited)

Don Whatley as FBI Agent (uncredited)