Alert: Missing Persons Unit

Mike is taken back to his first unsolved case when the remains of an Amish man surface seven years after his murder. After he reconnects with the man's family, the wife of the man mysteriously goes missing, prompting a massive search and disclosing a web of deceit.

The MPU searches for a kidnapped tough-as-nails neighborhood watch captain. Jason enlists Wayne's help investigating the car bombing. Mike is concerned Nikki is keeping secrets from him.

The MPU searches for a homeless female teen that disappeared after running away from home and living in Philly's Gayborhood. Kemi is hit especially hard as the team races to find and rescue the missing teen. Jason and Nikki spar over his continued investigation into the car bombing.

A young pregnant woman goes missing one day before her emergency c-section and the adopting mother turns to the MPU to locate her before the baby's life is risked. Meanwhile Jason digs deeper in the car bombing case and meets a disapproving Braun.

The MPU searches for a Benjamin Franklin aficionado after he suspiciously disappears during one of his city tours. Meanwhile, a new forensic scientist is hired and the team attempts to manage her over-eager working style. Jason and Mike try to bond as new partners.

As the MPU moves into new offices, which comes with new boss Inspector Hollis Braun, a call comes in reporting the disappearance of an entire city bus full of students on a field trip. The team utilizes a father who tried to stop the kidnapping, as Jason reaches out to an old colleague for assistance in the search.

Jason and Mike search the Allegheny Mountains to find a missing couple. Meanwhile, Keith joins a trauma therapy group and bonds with another patient.

A foster care worker is reported as missing, but after he ends his own life, the MPU starts to investigate a pregnant woman he was seen with who has been missing for two years. Meanwhile, Sidney follows Keith and fears he may be dangerous.

The MPU works to track down the kidnapped son of a doctor, but the case takes a turn when his mother gets in direct contact with the kidnapper. Meanwhile, Kemi expresses her concerns for Sidney's wellbeing to Nikki and Jason.

The MPU searches for a college student after she goes missing during a house party. Meanwhile, Sidney and Keith try to adjust to normal life again.

Jason, Nikki and the MPU team investigate when a woman runs down a man and forces him to get in her car at gunpoint. Meanwhile, more information about Keith's kidnapper comes to light.

The MPU investigates the abduction of a young child, whose abduction is likely revenge related to her father's work.