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21 Jump Street revolves around a group of young cops who would use their youthful appearance to go undercover and solve crimes involving teenagers and young adults.

Working for the FBI's Deep Cover Operations division, Martin Odum can transform himself into a different person -- whether it's an assignment as a Serbian extremist, a corrupt Chicago police officer, a British special forces colonel, or a legendary computer hacker. But when he learns that his life, itself, may be a lie, he faces the demands of his job and a desire to solve the mystery of his identity. And given the choice between the two, Odum doesn't always make the right decision.

Sydney Bristow, an agent who has been tricked to believe she is working for the U.S. government, is actually working for a criminal organization named the Alliance of Twelve. Upon learning this, Sydney becomes a double agent for the real CIA.

Members of a secret society chase immortality by seeking refuge in the bodies of others.

Fastlane is an American action/crime drama series that was broadcast on Fox from September 18, 2002 to April 25, 2003.

A chilling and unflinching look at all sides of a complicated issue, focusing on an African-American Muslim who joins an Islamic sleeper terrorist cell in the United States while working undercover for the FBI.

Michael Long, an undercover police officer, is shot while investigating a case and left for dead by his assailants. He is rescued by Wilton Knight, a wealthy, dying millionaire and inventor who arranges life-saving surgery, including a new face and a new identity--that of Michael Knight. Michael is then given a special computerized and indestructible car called the Knight Industries Two Thousand (nicknamed KITT), and a mission: apprehend criminals who are beyond the reach of the law. The series depicts Michael's exploits as he and KITT battle the forces of evil on behalf of the Foundation for Law and Government.

Nikita is a drug-addicted juvenile delinquent who was accused of killing a police officer in cold blood during an attempted robbery of a pharmacy. She is later arrested and sentenced to death by lethal injection, upon which she was secretly drugged by the government, faking her death. Nikita is then "recruited" by a secret government organization and transformed into a highly skilled assassin who cannot be traced.

Gabriel's Fire is an American television series that ran on ABC in the USA in 1990–1991. A revamped version of the series, entitled Pros and Cons, aired briefly the following season.

O Ha Na is a lowly police officer who lacks a sense of duty and believes that it is worth bending the rules in order to achieve your aims. She meets and begins to investigate Ko Jin Hyeok, an elite intelligence agent, and they clash instantly based on their different morals. Their initial dislike of each other masks their romantic attraction, but this development is hindered by the existence of Choi Eun Seo, Jin Hyeok's first love.

Cassie & Co. is an American drama series broadcast on NBC as a mid-season replacement. 13 episodes were produced, but it was pulled after four episodes in February 1982, with the rest airing in the summer. Angie Dickinson stars as Cassie Holland, a tough, divorced ex-cop who becomes a private detective, taking over a detective agency with her ex-con secretary Meryl (Dori Brenner) and gym instructor Benny (A. Martinez).

This drama series is a fictionalized retelling of the story of meth dealer-turned-ATF informant Charles Falco, who spent three years inside one of America's most dangerous motorcycle gangs, the Vagos. Although Falco originally took on the assignment to avoid spending 20 years in prison on drug charges, it eventually evolved into a quest for justice for him. “Gangland Undercover” documents the lives of outlaw bikers, who live in a world in which respect is earned through fear. The series is based on Falco's memoir, “Vagos, Mongols, and Outlaws,” and documented historical research of gang rivalries.