Kate falls for a mysterious man named Sergei at a political event; when a girl is murdered near the hotel where Kate and Sergei are staying, Kate thinks Sergei may be responsible.

While investigating a double murder committed by a vigilante killer, Megan questions a grief counselor who offers his services to help with issues concerning her father's suicide

Megan and and her team are shot at as they investigate a crime scene involving the murder of a notorious mobster's son; after a suspect is gunned down,

A murder being investigated by Megan and Tommy appears to be the result of child abuse, but the parents claim their daughter was possessed ,

Megan cracks the serial killer case but can't reveal the answers to her team while Lacey's life is in danger; District Attorney Dan Russell targets Kate.

Months after Peter's death, Megan returns to work and is surprised when a man from her past is assigned to her case; a serial killer targeting young war veterans takes Lacey hostage

After a car accident reveals a dead body in the trunk, the team is led to another body, leaving them with two cases to solve, while Megan is reconnected with an old acquaintance and Kate's job is threatened.