Season 4: Episode 1 - 7/11/2021
Parts of a body are found in a scrapyard. Meanwhile, after making the decision to retire from the police force, Cassie faces a dilemma.
Season 4: Episode 2 - 7/18/2021
Cassie and Sunny identify four potential suspects and decide to go public about the discovery of the remains.
Season 4: Episode 3 - 7/25/2021
Cassie and Sunny interview the suspects, who all deny knowing the victim. Collier manages to locate the rest of Walsh's body.
Season 4: Episode 4 - 8/1/2021
Cassie and Sunny discover Walsh was chased by all four suspects on the night in question. The pathologist identifies the cause of death.
Season 4: Episode 5 - 8/8/2021
Cassie and Sunny get closer to the truth of what happened. Unexpectedly, things take a devastating turn for Cassie.
Season 4: Episode 6 - 8/15/2021
Despite a tragic turn of events, the team narrows down the suspects. Will they succeed in bringing Walsh's killer to justice?