Despite marriage woes and personal struggles, London police detective Marcella Backland returns to her job after a 12-year absence.
EPISODE 1
Episode 1
After her marriage dissolves, former detective Marcella Backland struggles with jealousy and anger when she returns to work to hunt down a serial killer.
EPISODE 2
Episode 2
Marcella is in turmoil as she tries to piece together what unfolded at Grace's, as the team continue to hunt the killer.
EPISODE 3
Episode 3
The team discover Marcella's ties to Grace; Jason's affair is revealed; Peter remains a focus in the murders.
EPISODE 4
Episode 4
Marcella tries to find the taxi driver that was outside Grace's house on the night of the murder. Meanwhile, there is a new lead in the Grove Park case following an attack on an elderly man.
EPISODE 5
Episode 5
Jason manages to get his job back, while Marcella triumphs over Peter Cullen and finally gets the information relating to Grace's case.
EPISODE 6
Episode 6
The killer targets a six-year-old girl, which devastates Marcella. A DNA match on the corpse gives the police their strongest lead yet.
Anna Friel
Tobias Santelmann
Jamie Bamber
Jack Doolan
Ian Puleston-Davies
Laura Carmichael
Harry Lloyd
Charlie Covell
Nina Sosanya
Ray Panthaki
Sinéad Cusack