A man is supposed to guard a shipment of diamonds being sent by rail. But a man robs the train and kills the men guarding the diamonds. The robbers derail…

The Brookedale Psychiatric Hospital is a crumbling institution which barely has enough money to remain open. Formerly a prison, it sits atop a warren of tunnels and sewage system viaducts….

A commercial jet plane has been hijacked by a group of terrorists who don’t realize that a U.S. Air Marshal, Brett Prescott (Dean Cochran), is among the passengers. The fate…