John Korty Director Kim Darby Melodye Amerson Actor William Shatner Dr. Curtis Actor Dan O'Herlihy Sol Diemus Actor Diane Varsi Valancy Carmody Actor Laurie Walters Karen Diemus Actor Chris Valentine Clement Francher Actor Johanna Baer Bethie Actor Stephanie Valentine Talitha Actor James M. Miller Screenwriter Gerald I. Isenberg Producer Francis Ford Coppola Executive Producer Charles W. Fries Executive Producer Edward Rosson Cinematographer Patrick Kennedy Film Editing Carmine Coppola Original Music Jackson De Govia Art Director Fred Roos Casting