Richard Dreyfuss
— Dr. Jake Rainer
Linda Hamilton
— Karen Rainer
John Lithgow
— Dr. Rene Harlinger
J.T. Walsh
— Sheriff Mitch Rivers
Ben Faulkner
— Tim Warden
Liv Tyler
— Sylvie Warden
Zahn McClarnon
— Deputy Bear
Brandon Stouffer
— Halloween Kid #1
Treva Moniik King
— Halloween Kid #2
John McGee Jr.
— Deputy
Ron Tucker
— Forensic Detective
Catherine Shaffner
— Martha
Heather M. Bomba
— Twin #1
Marianne E. Bomba
— Twin #2
Jane Beard
— Carol Simmons