Dr. Daniel 'Dan' Challis
Ellie Grimbridge
Conal Cochran
Rafferty
Buddy Kupfer
Betty Kupfer
'Little' Buddy Kupfer Jr.
Marge Guttman
Linda Challis
Starker
Harry Grimbridge
Teddy
Walter Jones
Nurse Agnes
Sheriff
Assassin
Willie Challis
Bella Challis
Secretary
Red
Charlie
Curfew Announcer / Telephone Operator (voice) (uncredited)
Silver Shamrock Commercial Announcer (voice) (uncredited)
Watcher
Technician
Motel Technician
Technician #2