Det. Supt. Jane Tennison (Helen Mirren) is weeks from retirement, worn-down, and alcoholic. 14 year old Sallie Sturdy goes missing. Principal's daughter Penny Philips is her best friend. Sallie's father is faced with suspicion and then her body is found. She was pregnant. Tennison's father is in the hospital "on the way out" with cancer and she is pushed to go to AA where she runs into Bill Otley.
This is a great final act for a great character played by a great actress. Tennison is beset with personal problems that are well earned. Bill Otley returns to tie up his relationship with her. It's a short reunion but a very powerful one due to their history. He's also given a terrific death. Another great relationship is Mirren with young Laura Greenwood who plays Penny. She is almost like a daughter that Tennison never had after her abortion. The final scene is an emotionally devastating conclusion to Tennison's career. Greenwood is incredible in the face of the legend next to her. The second part does have a slow spot in the middle and the last section does rush a little to the finish. However, the final interrogation cannot have ended the franchise any better.