London Kills - Season 3 - Eps 5: Crossing the Line
When another black police officer is murdered, the team suspect he is the latest victim of the killer cop. After speaking with Sgt. Durrant, who attended a stop-and-search with the victim in the hours before his death, as well as with the subject of the search, the detectives suspect the crimes are racially motivated and attempt to save a high-profile target. David and Vivienne cross a huge line.
About London Kills

Title: London Kills
First Air Date: 2019-02-25
Last Air Date: 2023-07-10
Status: Returning Series
Rating: 6.4/10 (from 29 votes)
Language: EN
Seasons: 4
Total Episodes: 20
Network: BBC One Acorn TV
Genres: Drama, Crime
Production Companies: PGMTV, AMC Studios
Synopsis
With a documentary style delivery, this drama tells the story of a team of top murder detectives with each episode featuring a different murder while also following a serialized story involving the lead detective’s missing wife.
Cast

Hugo Speer
DI David Bradford

Sharon Small
DS Vivienne Cole

Bailey Patrick
DC Rob Brady

Tori Allen-Martin
TDC Billie Fitzgerald