A missing college sophomore is seen on video walking toward the waterfront; a woman threatens to jump off a bridge; a drug deal gone bad forces a gang member into hiding, endangering his family.

Caretaker reports her 63-year-old cancer patient is missing; a missing mattress may solve the case.

A missing man's life is under threat; a missing teenager has a rare sleep disorder.

Detectives search for a 14-year-old girl who was snatched by an older teen with possible gang connections; an elderly man with serious neurological problems goes missing.

The children of an Iraqi immigrant worry she is trying to return to Baghdad; daughters fear their mother was a victim of foul play.

A talented man vanishes on his bicycle; detectives must untangle the past to uncover the truth.