The team tries to track down a reclusive columnist who hadn't left her apartment in months and was communicating with numerous prisoners.

The team tries to determine whether or not the recent disappearance of an air traffic controller has connections to the Middle East. The team soon learns that his wife died in an automobile accident and he was having an affair with her sister.

When a woman disappears after her boyfriend is killed by the police, the team suspects gang involvement. Later, Sam learns she's pregnant.

The team determines if an ex-con's past criminal activity caused her to disappear after visiting a prison inmate. Det. Mars and Agent Johnson also continue their investigation.

The team discovers a long festering secret which sets off a deadly chain of events when they investigate the disappearance of the teenage son of a Secret Service man.

The team must decide whether or not a doctor's past is a factor in her disappearance.

Elena is forced to face the consequences of her past, as the team is put on the case to search for her former partner who went missing during an undercover sting.

The team investigates after a woman attends a self-defense class with her infant son and then both disappear after the class ends.

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.