S7, E1: Suspicion

Available on Acorn TV
A severed female hand is found in the Thames, which brings Detective Chief Inspector Roisin Conner in contact with Chief Superintendent Walker, who is now back in uniform after being found innocent at his murder trial. No body is discovered, and the case soon becomes a battle of wits against the killer, who has cleverly planned for every outcome in a bid to escape justice for his crime.
Starring Charles Dance