Forever Knight.S3E18.Fallen Idol

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.
S3E18 - Fallen Idol
When a mentally challenged teenager is the only witness to the murder of a popular wrestler, both Nick and Natalie agree to protect the witness, but while Nick attempts to find the killer, Natalie attempts to "cure" the boy.

Guest Starring:
Rob Stefaniuk (Joey)
Todd William Schroeder (Henry Ellis)

Cast:
Jim Mazon (Miles Filbourn)
Layton Morrison (Nitro)
Simon Bradbury (Director)
Selena Martin (Police Woman)
BJ McQueen (Tank Williams)
Tony Nappo (The Shark)
Hayden Christensen (Andre)
Bob King (Eddie Phelps)
Kevin Rushton (Johnny Harris)
Lina Giornofelice (Woman in Bar)

Written by Gary Stephen Rieck
Directed by Geraint Wyn Davies

Original Broadcast 30 sec. Promo:
Narrator -"On Forever Knight, a mentally challenged child is the subject of a risky experiment. Now, this dangerous potion could be deadly medicine.. on the next Forever Knight"