Dee Wallace
— Morgan Hanna
Cloris Leachman
— Millie Crown
Ron Kuhlman
— John Crown
Barry Laws
— Jeremy Crown
Delia Salvi
— Bette
Susan Dixon
— Zelda
Al Strobel
— Byron
Glen Baggerly
— Archie
Juleen Murray
— Sarah
Michele Mariana
— Lois
Bob Griggs
— Conroy
Marjorie Card Hughes
— Sophie
Richard Wiltshire
— Dr. Feldman
George Stokes
— Marty
Mya Chamberlin
— Girl in the Lighthouse
Steven Rock-Savage
— Tony
Robert Allen Waltemate
— Boy in Lighthouse #1 (uncredited)
Jon D. Anderson
— Boy in Lighthouse #2 (uncredited)