S1·E22 Paper Dove (1)

Frank is asked by Catherine's father to investigate a case involving a friend whose son has been convicted of murder, and is soon convinced that the murder is linked to a serial killer called The Woodsman. Having claimed his latest victim, the Woodsman takes the body to a secluded campsite, covers the body in plastic, buries her under a pile of leaves and strikes up a conversation. Later, he is given photos by a mysterious stranger and asked to use them as 'targets' for future killings - one of which includes Catherine Black...