In Australia, detectives hunt down five men for the rape and murder of an innocent. And in Los Angeles, FBI Special Agents need to stop four Russian immigrants who've set out on a kidnapping and killing frenzy.

In Ohio, detectives bring down a pair of brothers that terrorize a city by raping and killing young couples. And in Florida, investigators hunt cousin that impersonate cops as they capture, rape and kill.

In Georgia, detectives chase a hit man across several states, then chase the millionaire that hired the hit across the globe. And in Arkansas, FBI Special Agents hunt down a gang of triggermen - and the con men that hire them.

In Italy, the elite Carabiniere Police Force bust a pair of star-crossed lovers that butcher an innocent family. And in America's west, detectives take down a vicious couple that kidnap, rape and kill their sex slaves.

In Alabama, detective bust a preacher that uses Bible verses to justify killing and deep-freezing his wife. And in Kansas, detectives use every trick in the book to chase down and bust the internet's first serial killer.

In Detroit, the police hunt a killer that draws his victims close, then slices their bellies wide open. And near Boston, a V.A. Special Agent teams up with a detective to catch a serial murderess - one that kills - with a syringe.

In New York, detectives catch a wife that's served up very nasty cocktails to two unsuspecting husbands. And in Connecticut, a criminologist and a detective convict a husband of using a woodchipper to get rid of his wife.

In Australia, detectives listen in as a brutal bludgeoner spills the beans to a curious cellmate. And in Mobile, Alabama investigators tune in as a lovesick shooter wants to explain her murdering ways - to the woman she's killed.

Detectives put their heads together to collar fame-seeking murderers. Some aren't satisfied just to maim and kill. They need to see their name in the paper. And that's how you catch them.

In Sweden, detectives hunt a madman that's targeting people of colour. And in Oregon, detectives discover extremists in their backyard - extremists with a murderous plan.