Guest Stars Jessica Walter as Margaret Nicholson Lee Montgomery as Steve Spelberg Robert Walker, Jr. as Neil Cahill José Ferrer as Dr. Marshall Cahill Lew Ayres as Dr. Howard Nicholson Co Starring William Christopher as Male Scientist Deidre Hall as Receptionist Luis Moreno as Officer Lou Wagner as Ross Charles Macaulay as Farnsworth John Zaremba as Coroner 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