Guest Stars Sebastian Spence as Young Gerry Mel Harris as Dr. Christina Markham Geraint Wyn Davies as Sheriff Grady Markham Timothy Webber as Dep. Middleton Corrie Clark as Young Sylvia Harold Gould as Gerry April Telek as Young Lucy Heather Hanson as Young Helen Maxine Miller as Helen Betty Linde as Sylvia Co Starring David Lewis as Deputy A.J. Unger as Peter Maria Louisa Figura as Virginia Masters Walter Marsh as Dr. O'Keefe Crystal Cass as Alien Lindsay Bourne as Administrator
