Dr. Josh Keyes
Maj. Rebecca Childs
Dr. Ed 'Braz' Brazzleton
Dr. Conrad Zimsky
Serge
Theodore Donald 'Rat' Finch
Gen. Thomas Purcell
Cmdr. Robert Iverson
Dave Perry
Paul
Lynne
Danni
Acker
FBI Agent
Stickley
Court-Martial Presiding Officer
Dad
Mom
Little Boy
GBTV Reporter - Trafalgar Square
Flight Engineer Timmins
Endeavor Flight Engineer
Chief Engineer Mission Control
Scientist
Zimsky's Assistant
Pentagon General
FBI Agent - Rat's Apartment
Security Policeman - Tribunal
Rome Café Patron
Luke Barry
News Anchor
Project Destiny Engineer
Paris Café Lady
U.S.S. Constellation Captain
U.S.S. Constellation Screen Ops
U.S.S. Soldier (uncredited)
Scientist / Extra (uncredited)
Coffeehouse Patron (uncredited)
Beach-goer (uncredited)
(voice) (uncredited)
Security Policeman (uncredited)
Scientist (uncredited)
Himself
Technician - Virgil Base
Engineer (uncredited)
Chief Petty Officer (uncredited)
News Anchor (uncredited)