Tom Atkins as Dr. Daniel 'Dan' Challis

Stacey Nelkin as Ellie Grimbridge

Dan O'Herlihy as Conal Cochran

Michael Currie as Rafferty

Ralph Strait as Buddy Kupfer

Jadeen Barbor as Betty Kupfer

Brad Schacter as 'Little' Buddy Kupfer Jr.

Garn Stephens as Marge Guttman

Nancy Kyes as Linda Challis

Jonathan Terry as Starker

Al Berry as Harry Grimbridge

Wendy Wessberg as Teddy

Essex Smith as Walter Jones

Maidie Norman as Nurse Agnes

John MacBride as Sheriff

Dick Warlock as Assassin

Joshua John Miller as Willie Challis

Michelle Walker as Bella Challis

Paddi Edwards as Secretary

Norman Merrill as Red

Loyd Catlett as Charlie

Jamie Lee Curtis as Curfew Announcer / Telephone Operator (voice) (uncredited)

Tommy Lee Wallace as Silver Shamrock Commercial Announcer (voice) (uncredited)

Martin Cassidy as Watcher

Patrick Pankhurst as Technician

Jeffrey D. Henry as Motel Technician

Michael W. Green as Technician #2