Investigating the murder of a pizza delivery man, a London detective uncovers a tangled conspiracy involving drug dealers, smugglers and spies.
Cast:Carey Mulligan , Nathaniel Martello-White , Hayley Squires , Vineeta Rishi , Jeany Spark , Nicola Walker , John Simm , Kae Alexander , Ahd , July Namir , Billie Piper , Rob Jarvis , Ben Miles , George Georgiou , Guy List , Robert Portal , Siobhán McSweeney , Brian Vernel
Probing what could be a random street shooting, DI Glaspie turns to a victim's frightened family for clues. A key witness withholds evidence.
Glaspie and Bilk uncover a promising lead while MI5 gets involved. Under political pressure, David reveals Linh's secrets. Shaw endures a fresh trauma.
Sandrine is increasingly fraught. Peter Westbourne tracks her down, but fails to calm her. Sandrine returns to the army base, retrieves her gun and disappears. Faced with a second murder, Kip and Nathan struggle to figure out how the two killings are connected. Kip is convinced that MI5 is leaking information to the media.
As the net draws in, DI Kip Glaspie enters a dangerous power play with MI5. But is it too late to save everyone involved?