P.J. Detweiler
George Peppard
William Orbison
Raymond Burr
Sonny Silene
George Furth
Lita
Barbara Dana
Charlie (as Herbert Edelman)
Herb Edelman
Poppa
John Qualen
Police Lieutenant
Bert Freed
Thorson
Ken Lynch
Landlord's Agent
Jim Boles
Jackie
Arte Johnson
Calypso Singer
King Charles MacNiles
Miss Winnick
Mary Gregory
Maureen Preble
Gayle Hunnicutt
Waterpark
Brock Peters
Billings Browne
Wilfrid Hyde-White
Jason Grenoble
Jason Evers
Betty Orbison
Coleen Gray
Linette Orbison
Susan Saint James
Shelton Quell
Severn Darden
Elinor Silene (as H. Jane Van Duser)
Jane Van Duser
Assistant Production Design
Billy Sands
Makeup Artist
Bud Westmore
Costume Design
Jean Louis
Director
John Guillermin
Music
Neal Hefti
Story
Philip H. Reisman Jr.
Music Supervisor
Joseph Gershenson
Edward Montagne
Sound
Waldon O. Watson
Set Decoration
Robert Priestley
Title Designer
Cinefx
Visual Effects
Albert Whitlock
Lyle Cain
Unit Production Manager
Wes Thompson
Assistant Director
Phil Bowles
Hairstylist
Larry Germain
Screenplay
Editor
Sam E. Waxman
Producer
John McCarthy Jr.
Director of Photography
Loyal Griggs
Art Direction
Alexander Golitzen
Walter M. Simonds