Air Date: 2 February 1974
Series: Thriller – Season 2, Episode 2
Network: ITV (ATV / ITC)
Running Time: 75 minutes
Writer: Brian Clemens
Director: John Scholz-Conway
Production Design: Bryan Holgate
Overview
Once the Killing Starts is a standout episode from the acclaimed 1970s British anthology series Thriller, created by master suspense writer Brian Clemens. Originally broadcast on ITV on February 2, 1974, this psychological crime drama stars Patrick O’Neal, Angharad Rees, and Michael Kitchen in an early-career appearance.
The episode blends Columbo-style reverse whodunit mechanics with classic British noir elements, keeping viewers gripped with suspense and psychological tension.
Plot Summary
Professor Michael Lane, a married academic, becomes romantically involved with his student, Stella Mason. Driven by his desire to be with her, Lane devises a meticulous plan to murder his wife and construct an airtight alibi. Believing he’s pulled off the perfect crime, his confidence is soon shaken when he begins receiving anonymous letters accusing him of murder.
Convinced that fellow student George Newton is behind the poison pen campaign, Lane makes a fatal mistake — and kills again. But the mysterious letters don’t stop…
Cast
- Patrick O’Neal as Michael Lane
- Angharad Rees as Stella Mason
- Michael Kitchen as George Newton
- Gary Watson as Inspector Rush
- Patricia Donahue as Elizabeth Lane
- Gerald Sim as Peterson
- Terry Wright as Detective Constable Waters
Behind the Scenes
Brian Clemens, the writer behind most of the Thriller series, leans into an “inverted detective story” format here. Similar to the style popularized by Columbo, viewers know from the beginning that Lane is guilty — the tension arises from discovering who knows what, and how justice might eventually be served.
Inspector Rush, portrayed by Gary Watson, adds a classic touch as the persistent detective in a raincoat, always quietly observing in the background.
This episode is notable for featuring a pre-Poldark Angharad Rees, and a young Michael Kitchen, who would later become well-known for his role in Foyle’s War.
Why This Episode Stands Out
- Classic British crime atmosphere with a psychological twist
- Early roles from actors who later became major UK TV stars
- Smart, suspenseful writing from genre legend Brian Clemens
- A compelling mix of drama, mystery, and character study
Watch and Rediscover
Fans of vintage British television, crime dramas, and anthology thrillers will find Once the Killing Starts to be an essential episode from the Thriller series. Its tight plotting, eerie tension, and excellent performances make it a standout from the early 1970s.
