Carl Kolchak
Darren McGavin
Gail Foster
Carol Lynley
Dr. John O'Brien
Jordan Rhodes
Janos Skorzeny
Barry Atwater
Las Vegas Policeman (uncredited)
Edward Faulkner
Mrs. Brandon (uncredited)
Virginia Gregg
Intern (uncredited)
Buddy Joe Hooker
Irene Cagen
Sig Frohlich
Eddie Garrett
Tony Vincenzo
Simon Oakland
Monty O'Grady
Peggy Rea
Mark Russell
George Simmons
Bernie Jenks
Ralph Meeker
Sheriff Warren A. Butcher
Claude Akins
Police Chief Ed Masterson
Charles McGraw
District Attorney Tom Paine
Kent Smith
Mickey Crawford
Elisha Cook Jr.
Fred Hurley
Stanley Adams
Dr. Robert Makurji
Larry Linville
Producer
Dan Curtis
Original Music Composer
Bob Cobert
Teleplay
Richard Matheson
Director
John Llewellyn Moxey
Stunt Coordinator
Dick Ziker
Set Decoration
Fred Price
Casting
Hoyt Bowers
Director of Photography
Michel Hugo
Novel
Jeffrey Grant Rice
Art Direction
Trevor Williams
Editor
Desmond Marquette