Donald Sutherland
Matthew Bennell
Brooke Adams
Elizabeth Driscoll
Leonard Nimoy
Dr. David Kibner
Jeff Goldblum
Jack Bellicec
Veronica Cartwright
Nancy Bellicec
Art Hindle
Dr. Geoffrey Howell
Lelia Goldoni
Katherine Hendley
Kevin McCarthy
Running Man
Don Siegel
Taxi Driver
Tom Luddy
Ted Hendley
Stan Ritchie
Stan
David Fisher
Mr. Gianni
Tom Dahlgren
Detective
Garry Goodrow
Dr. Boccardo
Jerry Walter
Restaurant Owner
Maurice Argent
Chef
Sam Conti
Street Barker
Wood Moy
Mr. Tong
R. Wong
Mrs. Tong
Rose Kaufman
Outraged Woman
Joe Bellan
Harry
Sam Hiona
Policeman #1
Lee McVeigh
Policeman #2
Al Nalbandian
Rodent Man
Lee Mines
School Teacher
Robert Duvall
Preist on Swing (uncredited)
Michael Chapman
Health Dept. Floor Cleaner (uncredited)
Philip Kaufman
City Official on Phone (uncredited) (voice)
Al Perez
PG&E Man (uncredited)
Jeff Scheftel
Pod Person at Party (uncredited)
Kevin Harris
Dr. of Pods (uncredited)
Anthony Garibaldi
Student (uncredited)
Lori Randolph
Blonde Little Girl at Park (uncredited)