Cast of Dept. Q

Matthew Goode plays Carl Morck, an emotionally scarred detective responsible for setting up Department Q, a cold case unit.

Chloe Pirrie appears as Merritt Lingard, a ruthless and ambitious prosecutor.

Alexej Manvelov plays Akram Salim, a Syrian cop who flees to Europe and becomes part of the new department.

Leah Byrne is Rose, a cadet shaken by a breakdown and seeking a chance to prove herself in DCI Morck's team.

Kelly Macdonald portrays Dr. Rachel Irving, the police therapist.