As Lacey attempts to readjust to life after her kidnapping, the fractured M&A team assists a 15-year-old boy in finding his missing parents. Sir begins making plans for the future.Trent is forced to make a decision with a case of his own.
Bernard and Cosgrove are confronted with a plethora of suspects in the shooting of a headmaster at an elite private school.
Nash, while investigating an apparent gang killing, discovers that the weapon used for the job is the Army's newly missing man-portable, antitank system: The Javelin. Nash is assisted in the investigation by Sandra McCormick whoose career is on the line if the Javelin is not recovered.
Stories unfold for those left behind in the aftermath of Flight 828’s disappearance. Meanwhile, in the present, Cal takes Ben on a mysterious adventure that awakens Ben to his son’s perplexing abilities. Michaela tries to protect Jared from consequences at work, while keeping her romantic feelings at bay.
In the season finale, Ben and Michaela must confront a dire threat from Griffin, while tensions between Jared & Zeke get hot, and the Stone family makes a devastating discovery.