"Heidi Landgraf - Operation Green Ice," explores the double life of Heidi Landgraf, a rookie DEA agent who in 1990 went undercover for two years as a money launderer in the agency's most successful sting operation targeting the Cali drug Cartel.

This episode of Undercover: Double Life follows Detective Matt Browning as he goes deep inside Arizona's most violent skinhead organization; helping to solve two high profile murders and putting the gang's leaders behind bars.

FBI undercover agent, Jack Garcia was so convincing in his role as Jack Falcone an Italian jewel thief, that mafia captain Greg DePalma sponsored him for "made" membership into the infamous Gambino family.

"Mark Whitacre: Operation Harvest King," tells the story of Mark Whitacre, a high-level executive with Archer Daniels Midland, a Fortune 500 company, who worked undercover for three years to expose the largest price-fixing conspiracy in U.S. history.

In February of 1995, DEA Agent Phil Muollo goes undercover with the Hell's Angels in Lynn, Massachusetts - a group known for their drug dealing and unpredictable violence.

After being arrested for his role in a drug deal, a former biker from Tennessee decides to make a deal with the FBI, and learns there is a price to pay when you take on a role as an undercover informant.

"Bill Randall: Operation Equine" explores the double life of Bill Randall, an FBI undercover agent in 1989 who posed as a gym owner on a quest to buy steroids in the agency's first covert effort targeting illegal steroid dealers.

Operation Royal Charm follows Special Agent Lou Calvarese as he goes undercover to infiltrate an international cigarette smuggling ring and eventually discovers links to illegal arms dealing and a high-grade counterfeiting scheme.

The clock is ticking and the stakes are high for undercover ATF agent, as he poses as a hitman to stop an angry inmate from arranging a murder-for-hire plot to kill his estranged wife.

Star Washington Redskins safety Sean Taylor is shot dead by an intruder in his Miami home. And when it comes to the rich and famous, it seems like everybody has a motive...

San Diego police race to catch a killer with an unthinkable calling card.

A brutal double homicide shatters two families.

A young woman is found savagely murdered in her new home. Will the trail of clues police discovered lead them to her killer?

A mother of four is found handcuffed and murdered in the passenger seat of her car.

The murder of a beloved and talented church organist sends police on a disturbing search for answers.

A successful car salesman is killed in a hail of gunfire that erupted on his front porch.