Special Agent Maggie Bell, Special Agent OA Zidan and the team investigate the murders of 18 young women with help from a survivor associated with the deceased.

Maggie and Dana struggle to find justice for victims murdered by a serial killer who left a ghoulish mark on all of his victims, while the mayor limits the investigation in order to prevent economical loss.

A woman with information about the death of Maggie’s husband is abducted, leading OA and the team to uncover a criminal operation larger than anyone imagined. Also, Dana puts her career in jeopardy when she stands by and allows Maggie to work on this case that has such a personal connection to her.

After a Wall Street investor is murdered, the team is led to an insider-trading ring that uses unconventional methods to gain information. OA struggles to maintain confidence in his budding relationship with Mona.

A car crash results in the death of a photographer; Maggie sympathizes with his widow when she notices similarities with her own husband's death.

After an altercation with a student, a teacher goes missing, leading the team to investigate everyone who might have had a grudge against him. Also, a key witness in the case steps up to help, and Maggie does whatever she can to ensure their safety.

A former kidnapping victim is linked to a series of murders that includes the daughter of an NYPD detective. Also, Kristen begins to doubt her ability as an agent after a training exercise leaves her shaken.

The team searches for an abducted college coed; Jubal has a tense encounter with Rina's mother.

The team realizes they have a cross-country serial killer on their hands; the case has ties to Isobel's father, Robert, and his hotel, leading to revelations about their fractured relationship.

When a young couple is found murdered in a New York City park after returning from vacation, the team searches for a suspect linked to the drug trade. Also, Scola turns over a new leaf when it comes to his relationships.

The team investigates a series of brutal assaults; OA hides information about his own mugging.

After finding a group of teens dead from a drug overdose, the team races to find the dangerous dealer and his supplier. Meanwhile, OA questions where he stands in his faith.

When a prominent doctor is found dead in a ritualistic slaying, the team must race against time to hunt down a religiously motivated serial killer. Also, Scola faces a life-or-death decision.