Kolchak investigates a US military backed project called R.I.N.G. (Robomatic Internalized Nerve Ganglia), which is a robot that uses deadly force to defend itself against those who would harm it.

Cast: Darren McGavin, Simon Oakland, Julie Adams, Corinne Camacho, Bert Freed, Don 'Red' Barry, Jack Grinnage, Ruth McDevitt, Henry Beckman, Robert Easton, Maidie Norman, Bruce Powers, Vince Howard, Read Morgan, Craig R. Baxley