Second Time Around (S05E01)

The enigmatic passing of a former deputy police commissioner forces Morse to confront an old adversary, Chief Inspector Dawson. Teaming up with Lewis and the hesitant Dawson, they uncover a connection to the cold case of a young girl who was murdered 18 years prior. To catch the current perpetrator, they must delve back into the details of the original investigation, piecing together clues from the past.