Reed Diamond

as 'Algernon'

as David

as Mark Shapiro

as Raymond "Ray" Haffner

as Hansen Foundry

as Craig Bridges

as Daniel Whitehall

as Hayes Flynn

as Albert Stanton

as Officer David Burress

as Cameron Talbot

as Greg Limon

as Major Bryce Ferguson

as Dr. Martin Schaer

as Claude Nostromo

as Joel Fitzgerald

as Jason Pillar

as David Golan

as Bob

as Coast Guard Chief

as Cole Edwards

as Ray Lester

as FBI Agent Stone

as John Forstell

as John Aaron

as Evan Robards

as Colonel Stallings

as Richard

as Harold Balinger

as Terry Crowley

as Vincent Franzen

as Christopher Baylor

as Sergeant Wheatley

as Dr. Mike Gordon

as Jared Swanstrom

as Laurence Dominic

as Darren Musk

as Virgil Hoogesteger

as Dr. Kenneth Hill

as Peter

as Paul

as Noah Cahill

as Carter Albrecht

as Don Pedro

as Vincent Franzen

as Chad Billmeyer

as Eric Hayes

as Peter

as Barnes (voice)

as Commander Weston

as Henry Blomfeld

as Gordon Kimball

as Mike Kellerman

as Rachel's Boyfriend

as Fletcher Maxwell

as Jack Vasser

as Damien Karp

as Stuart Collins

as Mark Felt

as Tom Macon

as Phil

as Duty Officer

as Franklin Citron

as Tom

as Robert Yule

as Skip Naughton

as Hosea

as Mike Kellerman

as Andrew Farmer

as Brother Miller

as Man

as Therapist

as Gary Farrell

as Alan Caldwell

as Harvey

as Ralph

as Emil

as Emil

as Gavin

as Emil

as Leslie Harmon

as Harry Winslow

as Eddie Brannigan Jr.

as Doug Clifson

as Will Raymond

as Charlie

as Jeffrey Baker

as Thomas Rafferty

as Charles

as Stephen Sinclair

as Ben Constant

as Voice of Harvey

as Sean Jordan

as Lawyer

as Don Dunker

as Gary Farrell

as Kevin