Forever Knight.S3E10.Night in Question

Forever Knight is a 1992 - 1996 Canadian television series about Nick Knight (Geraint Wyn Davies), an 800-year-old vampire working as a police detective in modern-day Toronto, Ontario. Wracked with guilt for centuries of killing others, he seeks redemption by working as a homicide detective on the night shift while struggling to find a way to become human again.
S3E10 - Night in Question
Nick takes a shot to the head and forgets he is a vampire, an event both Natalie and LaCroix try to use to their own advantage.

Guest Starring:
Melanie Nicholls-King (Dr. Turner)

Cast:
Demo Cates (Paramedic)
Allegra Fulton (Nurse #1)
Alice Poon (Nurse #2)
Anais Granofskiy (Nurse #3)
Dimitri Frid (Russian Soldier)
Micheal Ricupero (Detective Maurer)
Don Dickinson (Detective Dunneback)
Heather Hodgeson (Policewoman)
Domenic Cuzzocrea (Leon Sharp)

Written by Gary Stephen Riect
Directed by Nicholas J. Gray