James Coburn
Dr. Sidney Schaefer
Soon-Tek Oh
Chinese Agent (uncredited)
William Daniels
Wynn Quantrill
Hank Worden
Dirty Old Man (uncredited)
Stephen Young
Man in Suit Killed in the Beginning (uncredited)
Dyanne Thorne
Cocktail Waitress (uncredited)
Will Geer
Dr. Lee-Evan
Pat Harrington, Jr.
Arlington Hewes
Arte Johnson
Sullivan
Eduard Franz
Ethan Allen Cocket
Severn Darden
Kropotkin
Jill Banner
Snow White
Godfrey Cambridge
Don Masters
Kathleen Hughes
White House Tourist
Walter Burke
Henry Lux
Joan Darling
Jeff Quantrill
Joan Delaney
Nan Butler
William Beckley
2nd Puddlian