Kolchak: The Night Stalker: Mr. R.I.N.G.

"Mr. R.I.N.G." is the twelfth episode of the supernatural mystery series Kolchak: The Night Stalker. It was directed by Robert Scheerer and written by Bill S. Ballinger and David Chase. It first aired on ABC on January 10th, 1975. In this episode, Carl Kolchak investigates the murder of Doctor Jules Copenik, a biologist for a multi-billion dollar oil drilling corporation. After learning that the man was savagely beaten to death with his arm torn out of his socket, Kolchak doggedly pursues the case, only to be railroaded by police captain Maurice Molnar. Several more similar murders take place and Kolchak discovers that the assailant is a neolithic ape man that had grown from fertile cells found within a block of ice. Kolchak pursues the creature into a series of underground tunnels where he has his final and deadly showdown.