The investigation into Billy Smolinski's disappearance after he discovered his girlfriend had cheated on him. Detectives try to find out if she is behind the mystery.

Investigating the disappearance of Michele Whitaker who vanished after hitching a ride from a truck stop.

The case of a mother-of-three who vanished, but as the case unfolds the community if shocked by the woman's secret past.

A basketball player and his girlfriend vanish while sailing, and investigators try to find the only person who may have information - the man's brother.

A series of dramatic events brings back into the limelight the case of a blues guitarist who vanished.

Twenty-three year-old Brandi Wells is a spirited young woman about to get a second chance in pursuing her lifelong goal. But, her dreams are cut short when police find her abandoned vehicle.

A woman's car is found abandoned and investigators try to find out whether she has been abducted or she is on the run.

When a lawyer disappears from a Colorado mountain town the local community are shocked, but investigators soon find secrets lurking beneath the town's idyllic veneer.

Following the search for teenager Lee Cutler, who went missing one morning after seeing a friend. Investigators try to discover if he has joined the Israeli army.

A 21-year-old college student goes missing after her car swerves off the road 140 miles away from her dorm.

When Rosemary Christiansen disappears, detectives investigate to see if her husband's new girlfriend has any information that might solve the mystery.

A 25-year-old woman disappears while out on a date with a friend from out of town; a suspected sexual predator is thought to be connected with the disappearance.

Madalyn Murray O'Hair disappeared in 1995 with two members of her family and over a half-million dollars.