Dennis Quaid
Lt. Tuck Pendleton
Kevin McCarthy
Victor Eugene Scrimshaw
Fiona Lewis
Dr. Margaret Canker
Harold Sylvester
Pete Blanchard
William Schallert
Dr. Greenbush
Kathleen Freeman
Dream Lady
Kenneth Tobey
Man in Restroom
Joe Flaherty
Waiting Room Patient
Andrea Martin
Waiting Room Patient
Jason Laskay
Scrimshaw's Henchman
Frank Miller
Scrimshaw's Henchman
Christine Avila
Lab Technician
Alexandra Borrie
Lab Technician
Robert Gounley
Lab Technician
Terence McGovern
Travel Agent
Rance Howard
Supermarket Customer
Chuck Jones
Supermarket Customer
Laura Waterbury
Supermarket Customer
Kurt Braunreiter
Lab Assault Henchman
Brewster Sears
Lab Assault Henchman
Alan Blumenfeld
Man with Camera
Jeffrey Boam
Lydia's Interviewee
Paul Barselou
Man on Plane
John Miranda
Man in Elevator
Jordan Benjamin
Little Kid in Mall
Virginia Boyle
Shopping Lady
Herb Mitchell
Camera Store Clerk
Neil Ross
Pod Computer (voice)
Robert Gray
Lab Assault Henchman
Joe Dante
Vectorscope Employee (uncredited)