Boris Karloff
(Host / Capt. John Elwood / Jonas Atterbury / Dr. Francis Mason)
Harry Bartell
(Edward Paige)
Thomas Browne Henry
(Blue)
Kay Stewart
(Ruth Elwood)
Paul Bryar
(Police Lt. Davis)
Gretchen Thomas
(Elizabeth Foley)
Tudor Owen
(Capt. Barney)
Dorothy Allison
(Judith)
Russ Bender
(Calvin Logan)
Niall MacGinnis
(Walter)