The Deadly Valentine

The ""Valentine Murderer"" already has killed three women after sending them letters and candy. When Betty, who has just moved into a new apartment, also receives a Valentine gift everyone assumes she is next on the killer's list. While Barnaby and J.R. search for the killer, Betty is assigned a police body guard whom she dated briefly. Barnaby and J.R. find the killer but Betty turns out to still be in danger.