Kolchak: The Night Stalker - Season 1 - Eps 19: The Youth Killer
Young swinging patrons of an exclusive dating service are turning up, dead of old age. The police don't believe they are the same persons, but Kolchak investigates and discovers that the head of the dating service is actually Helen of Troy, who sacrifices perfect young victims to Hecate, her patron goddess, in return for eternal youth and beauty. The fact that Helen is unaware one of the victims had a glass eye and lied about it on their form proves vital to Kolchak when he accidentally dons one of the rings that lets Helen sacrifice her victims in the appropriate manner.
About Kolchak: The Night Stalker

Title: Kolchak: The Night Stalker
First Air Date: 1974-09-13
Last Air Date: 1975-03-28
Status: Ended
Rating: 7.575/10 (from 80 votes)
Language: EN
Seasons: 1
Total Episodes: 20
Network: ABC
Genres: Drama, Mystery, Sci-Fi & Fantasy
Production Companies: Francy Productions, Universal Television, Dan Curtis Productions, ABC Circle Films
Synopsis
Kolchak: The Night Stalker is an American television series that aired on ABC during the 1974–1975 season. It featured a fictional Chicago newspaper reporter who investigated mysterious crimes with unlikely causes, particularly those that law enforcement authorities would not follow up. These often involved the supernatural or even science fiction, including fantastic creatures.
Cast

Darren McGavin
Carl Kolchak

Simon Oakland
Tony Vincenzo

Jack Grinnage
Ron Updyke