Forever Knight S02 E23 Near Death

"13TH CENTURY VAMPIRE. 20TH CENTURY COP."

Nick investigates the death of a young doctor when Natalie is unable to determine the cause. Intrigued by the doctor's experiments in near death experiences, Nick secretly agrees to "go under" in an attempt to reconcile his own past. But the experiment goes awry and Natalie must find a way to bring Nick back form his altered state of consciousness.