Heroin can be life threatening, claiming the lives of numerous victims. Follow this opium derivative as it begins in a remote Afghan heroin lab that processes the raw materials and then on to Chicago, where a dealer demonstrates its final preparation for street sale. Gain insight into its insidious powers from users, and witness a police raid on a heroin distribution network in New Jersey. Plus, go inside one radical attempt to combat heroin's social costs by supplying it free to addicts.

Bruce volunteers the family to help out at a charity boxing event; Kourtney babysits for some friends and learns a valuable lesson in child care.

In Iceland, a giant boring machine called Jaws is tunneling through miles of basalt, one of the world's hardest rocks. The tunnel is the linchpin of a massive hydro-electric plant that will use glacier melt water to make electricity.

The club exploits its porn connections to entertain Henry Lin’s clients, which doesn’t sit well with one member.

Either someone has something to protect, or it's dangerous in there. Challenge the world's best safecracker to defeat a bank vault, and see the methods a bank uses to protect its money and tellers. Travel to New Mexico to find out how the government plans to keep people away from a nuclear waste site for the next 10,000 years. Tour Master Lock to see how padlocks and combination locks are made, as well as how facial recognition, irises, and even vein structure can "unlock" biometric locks.

Some call methamphetamine the "Devil's Drug." Often made in less than an hour from a common cold remedy, this powerful stimulant is sweeping across the U.S. and Asia. Follow a raid on a suspected meth lab, stake out a neighborhood pharmacy where addicts attempt to accumulate cold and flu pills, and meet a neuroscientist urgently searching for a cure for addiction. See the dangers of meth and the unexpected physical damages caused by the drug.

A young drifter working on a river barge disrupts his employers' lives while hiding the fact that he knows more about a dead woman found in the river than he admits.

The combat rifle is the soldier's closest companion. Despite the revolution in battlefield tactics over the past 100 years, it is still the mainstay of every modern army in the world.
Now meet the best of the best, these are the top ten combat rifles of all time.