Rod Taylor
H. George Wells
Acting
Alan Young
David Filby / James Filby
Acting
Yvette Mimieux
Weena
Acting
Sebastian Cabot
Dr. Philip Hilyer
Acting
Tom Helmore
Anthony Bridewell
Acting
Whit Bissell
Walter Kemp
Acting
Doris Lloyd
Mrs. Watchett
Acting
Bob Barran
Eloi Man (uncredited)
Acting
Paul Frees
Talking Rings (voice) (uncredited)
Acting