Forever Knight.S2E10.Father's Day

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.
S2E10 - Father's Day
A mafia don tries to blackmail Nick when the don's grandson tries to hide his family avoid a life a crime. Meanwhile, Schanke tries to answer the question "what is a father?" for his daughter's school assignment.

Aka. Vaeter und Soehne (Fathers and Sons)

Guest Starring:
Peter Boretski (Don Thomas Constantine)

Cast:
Peter Outerbridge (young Thomas Constantine)
Maurice Godin (David Constantine)
Nicole Oliver (Karen Constantine)
Vito Rezza (Johnny Larnar)
Robert Latimer (Customs Officer)
Tony Craig (Sgt. Carter)
Matt Birman (Carey)
Randy Butcher (Jim)

Written by Gillian Horvath
Directed by Bruce Pitman