Forever Knight (1992)

S3E7 Hearts of Darkness

A customer at the Raven is discovered dead, seemingly the victim of a vampire under mysterious circumstances. The woman present at the scene has no recollection of what happened, and the investigation turns up no leads. Nick is tasked with tracking down the vampire murderer before another attack occurs, all while trying to shield Tracy from danger. Meanwhile, Tracy is aware that a vampire is involved and is determined to uncover the killer's identity herself.