6.247 minSeason 3 • Episode 4
LatestOperation Perseus reaches its climax as Kieran prepares to catch Shakiel with a car-load of automatic weapons. However, Spencer's killer, Jermaine King, has escaped from custody and kidnapped Ryan's sister, Tia.
A veteran beat cop and teenage girl fall to their deaths from a tower block in south-east London, leaving a five-year-old boy and rookie police officer Lizzie Griffiths on the roof, only for them to go missing. Detective Sergeant Sarah Collins is drafted in to investigate, working to find Lizzie before she comes to serious harm, but also to uncover the truth behind the grisly tower block deaths.
Acting
Gemma Whelan's controlled fury as the ice-cold Collins.
Writing
Harbinson's authentic canteen dialogue and procedural detail.
Production
Tower blocks as suffocing character — claustrophobic estate realism.
Creator
Patrick Harbinson
Gemma Whelan
DI Sarah Collins
Tahirah Sharif
DC Lizzie Adama
Jimmy Akingbola
DC Steve Bradshaw
Emmett J. Scanlan
DI Kieran Shaw
Bobby Lockwood
DC Lee Coutts
Ella Smith
DS Elaine Lucas
Karl Davies
DCS Tim Bailie
Michael Karim
PC Arif Johar
Daniel Adegboyega
Shakiel Oliver
Laurie Delaney
Mary Shaw
Lamar Waves
Ryan Kennedy
Robbie Gee
DS Mark Angel
Omar Malik
Ujal Jarral
Trivia, insights & behind the scenes
Based on Kate London's novel 'Post Mortem' — she was a real Met detective, and it shows in the canteen politics.
The tower block setting deliberately echoes Grenfell-era conversations about social housing neglect and who gets left behind when systems fail.
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