Forever Knight.S1E14.Spin Doctor

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.
S1E14 - Spin Doctor
The murder of a muckraking journalist during a mayoral election puts Nick in mind of when he was Professor Nicholas Girard (Chicago, 1954) -- and on trial before the HUAC on charges of being a Communist

Aka. Eine schneeweisse Weste (A Snow-white Vest)

Guest Starring:
Lisa Howard [Laura Neil]
Dixie Seatle [Barbara Norton]

Cast:
Barry Flatman
Christa Daniel
Brenda Kamino
Sandi Ross [Grace]
Scott Walker Steve Tate
Robert Morelli
Michael Reynolds
Chantal Craig
Deborah Lobban
Anita La Selva
Timothy Macdonald
Ron Bullied
Patrick Mckenna