Wiseguy - Season 3 - Eps 14: To Die in Bettendorf
Steelgrave's former accountant, Sid Royce, is suffering in the Witness Protection life Frank assigned him. When his wife leaves, he snaps and decides to get revenge against Frank for destroying his life. Jenny agrees to have dinner with Frank, then invites him back home. Their romantic evening is destroyed when Sid pulls a gun on them. Jenny talks Sid into letting Frank go by convincing him she's his missing wife. Frank kills Sid in front of Jenny, ending whatever chance they might have had at reconciling. (source: http://www.plasticcow.com/wiseguy)
About Wiseguy

Title: Wiseguy
First Air Date: 1987-09-16
Last Air Date: 1990-12-22
Status: Ended
Rating: 6.5/10 (from 31 votes)
Language: EN
Seasons: 5
Total Episodes: 75
Network: CBS
Genres: Crime, Drama, Action & Adventure
Production Companies: Stephen J. Cannell Productions
Synopsis
Vinnie Terranova does time in a New Jersey penitentiary to set up his undercover role as an agent for the OCB (Organized Crime Bureau) of the United States. His roots in a traditional Italian city neighborhood form the underlying dramatic base throughout the series, bringing him into conflict with his conservative mother and other family members while acting undercover as syndicate enforcer.
Cast

Steven Bauer
Michael Santana

Jonathan Banks
Frank McPike

Jim Byrnes
Daniel Benjamin 'Lifeguard' Burroughs

Cecil Hoffman
Hillary Stein

Maximilian Schell
Amado Guzman