Police have to rush to stop a man who has already murdered his wife's lover, and looks intent on getting to and killing her. However, upon a closer look, it appears that there is more to the situation than meets the eye.
The officers and detectives come down hard on a lawyer who seems to have murdered his ex and dumped the body, with his mentally fragile brother proving to be the key in bringing him to justice.
Joel and Fearless arrest a suburban housewife who 26 years earlier under a different identity was involved in an armed robbery which killed two people. One of those people was the ex-partner of Tom's dad, who begins to have flashbacks to the day it happened.
On Halloween night, a man hijacks an ambulance, holding Teresa hostage and demanding that she save his brother who was earlier shot in the chest during a botched robbery attempt. David McNorris and wife attend a Halloween bash and encounter Andrea Little.
After a Russian mobster kills a man in a public restaurant, a little girl comes forward as the "only witness" to the crime. Fearless must decide whether to have the girl testify and risk her safety or have her keep quiet and allow the Russian mobster to go free, putting others in possible danger.
Two men rob a sporting goods store and hold everyone inside hostage. After hearing that one of the hostages inside is a former 80s TV star whose role inspired him to become a cop, Ray decides to go inside in an effort to save the day.
Following a deadly accident, Joel and Fearless stumble upon evidence that the crash may have been part of an insurance fraud ring. Fearless discovers that the insurance claims investigator with whom he'll working on the case with is a former flame.
A young Asian girl is found murdered at the home of a wealthy Hollywood producer. David McNorris ponders selling his soul in order to protect the producer's son who becomes the prime suspect in the murder.
A teenage girl is abducted and kidnapped not far from her home. The only witness is an emotionally disturbed man who thinks he is a coyote and has lost all communication skills.
Joel and Fearless investigate the death by assault of a homeless man in a public park. After interviewing people at the scene, they quickly discover that the prime suspect might have been goaded on by two amateur filmmakers,who were recording the assault in an attempt to sell it on the black market.
After an explosion at a meth lab leaves one person dead, Tom and Ray suspect a feuding couple. However when one of them turns up dead near police headquarters, they must refocus their investigation on someone out for revenge. Teresa begins to have feelings for Joel.
After the ambush and murder of two police officers, the station is put on a lock down upon the discovery that the gunmen were tipped off by someone in the police force.
The murder of a small time drug dealer in Fearless' old neighborhood forces him to face some demons from his past, and puts him in a choice between redemption or revenge.
Following the breakup of his marriage and the end of his relationship with Andrea Little, David McNorris goes on an all-night drinking bender. He wakes up the next morning unable to remember anything that happened the night before. Things get interesting when he realizes there is a huge dent and a blood stain on the front of his car and he hears a report of a hit-and-run fatality that occurred during his blackout.
Joel is under investigation by Internal Affairs after one of the files from the night of his baby daughter's death turns up missing. Tom is promised a promotion to detective by the IA investigator if he works with him to help nail Joel.
