The series follows a group of real-life volunteers as they are trained by former spies, military, and law enforcement in espionage techniques, including maintaining a false identity, fitness, weapons handling, surveillance, persuasion and recruitment.
During the rest of the production, candidates were eliminated from competition by host and former Delta Force NCO Eric Haney.
The four final contestants were: With the help of some undercover Tijuana detectives, the producers put the four finalists through a series of tests that became progressively more difficult.
The final episode was dedicated to second-place finisher Tarbill, who died from accidental carbon monoxide poisoning in December 2003.
The incident, caused by a faulty natural gas pool heater, was later found to be an act of negligence resulting in a $4.4 million settlement.