Season 5

When federal authorities seize a renegade rancher's family cattle in 2014, heavily armed anti-government militias come to his aid and a dangerous showdown ensues.

The FBI faces down a group of anti-government ranchers and heavily-armed militias who've taken over a federal wildlife refuge in Oregon. A car chase through the mountains ensues, and when one rancher refuses to surrender, the showdown turns deadly.

The stabbing death of a wealthy young husband of a beauty queen in Old San Juan leads to a full blown murder-for-fire conspiracy investigation and an international manhunt by the FBI.

Agents uncover the largest oxycodone trafficking operation in American history. But building a case is easier said than done, when the drugs are legal. The FBI zeroes in on twin brother pain clinic owners, suspecting they're running a pill mill.

Days before Christmas, a Pan Am plane crashes in the remote Scottish village of Lockerbie. 290 people are killed, including 190 Americans. The investigation leads the FBI across the world in a quest to find out what caused the unspeakable tragedy.

The FBI gets a tip that the McDonald's Monopoly promo games are rigged, and a mysterious figure dubbed "Uncle Jerry" is behind this scam. There's a race against the clock, as McDonald's agrees to run one more game, hoping to catch him in the act.

The FBI has one shot to catch the McDonald's Monopoly scammers in the act. Agents deploy some very creative undercover techniques to gather evidence. Days away from the takedown, a fax sent to the wrong organization could derail the entire case.

After Bernie Madoff confesses to the FBI that he's responsible for a $64 billion Ponzi scheme he is quickly arrested, but the FBI's job is just beginning. They have the long task of recovering stolen assets to help those whose lives he had shattered.

A small-time crook hoping for a break alerts the FBI to a cadre of corrupt cops within the Boston Police. But taking down three SWAT-trained members of a police force comes with unavoidable risks.

The FBI uncovers a state-sanctioned plot to steal technology that makes U.S. submarines nearly undetectable to enemy sonar - and deploy it in Chinese subs.