An escapee from Castro's Cuba was the mastermind behind terrorist organization Omega 7. This group sought to carry out their mission through bombings and assassinations, financing their crimes through extortion and by aiding drug traffickers.

In the 1970s and 80s, a Puerto Rican separatist group, FALN, set off bombs in major U.S. cities. Advocating complete independence for Puerto Rico, the group went on a major bombing spree and FBI agents found themselves racing against time to put a stop to their violent activities.

In 1990s Philadelphia, a ruthless grab for power led to a full-scale mob war. Using informants and high-tech surveillance, the FBI infiltrated the most powerful mob family in the city and sought to bring it down before innocents were killed.

In the 1980s, the FBI targeted a sharp bank robber known as the Shootist. He had performed more than 50 robberies across California, Texas and Washington with military precision, claiming the longest string of unsolved bank robberies in history.

The Los Macheteros terrorist organization sought to end U.S. rule of Puerto Rico through extreme violence. When the group claimed they attacked 18 unarmed servicemen traveling near San Juan, the FBI was called to investigate the ruthless killers.

In the 1980s, gangs ruled the streets of Chicago. Led by Jeff Fort, the dangerous, power-hungry El Rukn gang attempted to conspire with Libya to perform acts of domestic terrorism for money.

In 1976, a car bombing in Washington DC’s Embassy Row claimed the lives of a former Chilean ambassador and his assistant. During the investigation, it became apparent to FBI agents that a foreign government had ordered the attack.

In 1980, a maid discovered that a copy machine, placed in a busy Las Vegas casino, was actually a bomb. Agents and bomb experts were called in to disarm the deadly device and stop the dangerous extortionist who built it.

A special task force was formed in the 1990s to combat the flow of Colombia cocaine into New York ports. As part of an elaborate sting operation, one detective went undercover and infiltrated a drug gang connected to Pablo Escobar’s Medellin cartel.

After a parole officer was found shot dead in his car, the FBI, DEA and NYPD struggled to contain gang-related drug violence. Authorities sought to put two drug kingpins, Howard “Pappy” Mason and Lorezno “Fat Cat” Nichols, behind bars for the crime.

In the 1980s, the FBI investigated wide-scale corruption among the detectives of the San Juan, Puerto Rico Police Department. One detective broke the blue wall of silence and went undercover to help the FBI end the corrupt cops' activities.

When notorious bank robber Byron Chubbuck escaped from New Mexico State Penitentiary in 2000, he almost immediately began stealing again. Though he claimed the stolen loot went to the poor, it was clear to the FBI Chubbuck was no folk hero.

On July 4, 1987, seven inmates broke out of a high-security prison in New Mexico. Murderer William Wayne Gilbert orchestrated the escape. In a manhunt, authorities and scientists used the Bureau’s crime laboratory to catch these dangerous criminals.

Dartmouth Professors Susanne and Half Zantop are found brutally murdered in their New Hampshire home. With no trace of forced entry, the FBI Behavioral Science Unit found two teenagers were responsible for the heinous crime.

A series of bizarre shootings terrorized the small town of East Point, GA, and left two people dead and two others critically wounded. As the body count climbed, the killer taunted law enforcement with mysterious notes.

In Boston, FBI agents tracked down a gang of robbers who specialized in armored car takedowns. As the robberies grew increasingly more violent, authorities launched a complex sting to trap the deadly ring of thieves.

In the 1990s, a gang based in the U.S. Virgin Islands smuggled large amounts of cocaine into mainland America. In an investigation spanning from Georgia to South America, the FBI and DEA were able to identify the leader and bring down the drug ring.