The Way Through the Woods

S8 E1: The Lovers Lane Killer is dead, and the man accused of murdering five people has been killed as well. However, the case is not closed as the body of Karen Anderson was never found. Morse is convinced that Karen's remains are in Wytham Woods and not at the bottom of the lake at Blenheim, where her bag was found. What Karen was doing in Oxford, and what clue the postcard found in her bag holds to her disappearance are still unanswered.