Guest Stars Mel Harris as Dr. Christina Markham Sebastian Spence as Young Gerry Timothy Webber as Dep. Middleton Harold Gould as Gerry April Telek as Young Lucy Heather Hanson as Young Helen Corrie Clark as Young Sylvia Geraint Wyn Davies as Sheriff Grady Markham 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 Lindsay Bourne as Administrator Walter Marsh as Dr. O'Keefe Crystal Cass as Alien
