Forever Knight - Season 3 Episode 6 My Boyfriend is a Vampire 13TH CENTURY VAMPIRE. 20TH CENTURY COP.
Overview: Both Natalie and Tracy start thinking about relationships, when a woman reveals on a talk show that her boyfriend is a vampire. When the woman is found murdered, Nick must find out if the murderer truly is a vampire and stop him before he strikes again. At the same time both Natalie and Tracy struggle with what to do about the relationships (or lack therof) with the men -- or rather vampires in their lives.