Pritchard and Duval team up to chase a serial killer. Meanwhile, Mary and Pritchard's bond grows stronger, but Otto wants to make sure she'll always be by his side; and Gracie tries to get to the bottom of Pritchard's identity.
An important drug dealer is responsible for a murder 20 years before, which Pritchard helped to cover up.
Pritchard needs to try and hide his history with Wally, who is now dating his daughter, Helen, after it is discovered that Wally is being coerced by a prisoner planning an escape.
Pritchard and Duval attempt to catch a killer who mutilates and disfigures victims.
A dead pool makes a prediction that Mary will die on the same day as the launch of an important Lookinglass product. Pritchard ends up at the hospital following a brawl.
A former case ends up becoming relevant as Pritchard and Duval take a look into some murders involving young prodigies.
Jimmy attempts to prove that he was a better police officer and man than Duval ever realized. A deadly psycho and another father-son duo cause problems.