Season 4 Episodes
1. The Vanishing Policeman
While Detective Angie Flynn and Staff Sergeant Vega adjust to his new role, the suicide of an officer with whom Angie and Detective Brian Lucas worked on a crime scene turns the team’s investigation into a hunt for a cop killer.
2. The Dead Name
Angie fills in as staff sergeant while investigating a football player's wife's murder.
3. Index Case
The team goes after a killer who is spreading a lethal pathogen across the city.
4. The Score
Angie and Paula investigate the murder of an ex-con. Vega faces his boundary issues with Dr. Rogers and Lucas.
5. The Scorpion and the Frog
A murder with a familiar signature could mean a woman was wrongly convicted of a crime.
6. Interference
The murder investigation of a suburban mom takes a turn when her child is abducted.
7. The Dead Hand
Angie stays with a soldier who demands justice by taking the bullpen hostage.
8. Foreign Relations
Angie partners with an international agent to investigate the murder of a British politician's son.
9. Remains To Be Seen
The team goes on a hunt through the past to find the killer of a video game designer.
10. In Plain Sight
A woman is found nail-gunned to death. Angie embraces her relationship with Jack. Vega's frustrations force him to look for other options.
11. Natural Selection
A woman is murdered with what appears to be a medieval weapon.
12. Chronology of Pain
Angie races to catch a killer who is an expert at covering their tracks.
13. We'll Always Have Homicide
Three years after a killer gets away, the team reunites to close the case.
