Guest Stars Jessica Walter as Margaret Nicholson José Ferrer as Dr. Marshall Cahill Lew Ayres as Dr. Howard Nicholson Robert Walker, Jr. as Neil Cahill Lee Montgomery as Steve Spelberg Co Starring Deidre Hall as Receptionist William Christopher as Male Scientist Lou Wagner as Ross Charles Macaulay as Farnsworth John Zaremba as Coroner Luis Moreno as Officer William Bryant as Fields Bert Holland as Whitehead Dianne Turley Travis as Lady Scientist Darrell Zwerling as Motel Manager Arthur Batanides as Murph Dennis Robertson as 1st Reporter Jefferson Kibbee as Jeff Ed Fury as Plainclothesman