Sam's darkest secrets are revealed when her sister goes missing she decides to search for her without the team's help.

The disappearance of an ultimate fighter leads the team to investigate his background, where they learn the man had a number of enemies.

While struggling to deal with the aftermath of Jack's accident, the team searches to find a teen heart transplant recipient, believing her disappearance might be connected to her donor. Samantha talks to Brian.

After the latest lottery winner goes missing, the team works to figure out why.

A truck driver goes missing after saving a boy's life, and the team determines if that has anything to do with his disappearance. Meanwhile, Jack's mental health is examined by a psychiatrist.

The team is called in to investigate the custody kidnapping over a teen who vanished after last seen with her mother. But the case takes a turn when they discover the teen was living a secret life. Meanwhile, there is a bump in the road of the relationship between Jack and Samantha.

The team searches for a bar owner who goes missing shortly after his statue of St. Theresa cries. Brian's visit takes a new turn.

While working on a high profile civil case, a trial consultant vanishes. Jack and Sam learn how to make adjustments as Brian and Finn spend more time together.

The team believes that the past of a missing psychologist's brother might have played a role in his disappearance. Martin's relationship with Kim takes a spicy turn.

The suspect list keeps growing as the team investigates the disappearance of a Russian matchmaker.

The team looks for a missing journalist after her hardcore exposes are published on an on-line magazine. They begin to suspect a politician, the subject of one of her latest entries. Meanwhile, Brian remains in Sam and Finn's life.

After Hanna's boyfriend disappears from Chicago along the way to New York, Jack hesitates to assign the team on his case.

The team searches for a man who goes missing after a late night dive and try to zero in on who could be responsible for his disappearance. Meanwhile, Danny and Elena take their relationship to another level.