H. George Wells
Rod Taylor
David Filby / James Filby
Alan Young
Weena
Yvette Mimieux
Dr. Philip Hilyer
Sebastian Cabot
Anthony Bridewell
Tom Helmore
Walter Kemp
Whit Bissell
Mrs. Watchett
Doris Lloyd
Eloi Man (uncredited)
Bob Barran
Talking Rings (voice) (uncredited)
Paul Frees
Makeup Designer
William Tuttle
Producer
George Pal
Director
Novel
H.G. Wells
Hairstylist
Sydney Guilaroff
Original Music Composer
Russell Garcia
Art Direction
George W. Davis
William Ferrari
Director of Photography
Paul Vogel
Set Decoration
Henry Grace
F. Keogh Gleason
Screenplay
David Duncan
Editor
George Tomasini
Assistant Director
William Shanks
Makeup Artist
John Truwe
Recording Supervision
Franklin Milton
Special Effects
Wah Chang
Gene Warren