Season 3 Episode 7
A vampire (Malcolm McDowell) eschews the tradition of attacking mortals, satiating his need for blood by working as a night watchman at a blood bank, but the owner (George Wendt) soon realizes that his own business is being sucked dry and warns of bankruptcy. The vampire must return to his old ways in order to replete his “embezzlement”, so he tries to solve his quandary by attacking dangerous criminals, all whilst struggling with the romantic advances of a cute secretary (Sandra Dickinson).
Also starring Michael Berryman and Paul Gleason.
Source: The Vault of Horror #20