Andy Griffith as the sheriff of a ski resort terrorized by a murderer. Betty: Sheree North. Dr. Hammond: John Larch. Troy: John Calvin. Carter: Tim O'Connor. Cynthia: Elayne Heilveil. Doris: Louise Latham. Lockhard: Lawrence Pressman. Grace: Joyce Van Patten. Charley: Charles Tyner. Dave: Nick Nolte. Jud Taylor directed.