Marcella is a British Nordic noir detective series,[1][2][3] written, directed and produced by Swedish screenwriter Hans Rosenfeldt, creator of The Bridge.

[5] The series stars Anna Friel as Marcella Backland, a former London detective who returns to work to investigate an open case from 11 years earlier involving an unidentified serial killer who appears to have become active again.

[17] Marcella Backland (Anna Friel), a former London Metropolitan Police Service detective, decides to return to work after her husband of 15 years, Jason (Nicholas Pinnock), abruptly announces he is leaving her.

Marcella investigates a serial killer of children, encountering a paedophile, an arrogant millionaire, a 1970s rock star, and strange symbols relating to witchcraft.

Her estranged husband Jason has become engaged to his rehab nurse even though their divorce is not yet finalised, putting their children in the middle of a custody battle that quickly becomes ugly.