The Handler (2003)

Unorthodox but effective FBI veteran agent Charles Barker takes on a rookie partner, Ellis Dove. Barker trains Dove in a hard-edged, psychologically driven approach towards undercover work, where a moment's hesitation can lead to death. As the job takes its toll on Dove, an Internal Affairs team tries to enlist the rookie as a double-agent in the bureau's investigation of his partner.

Sergeant Thomas Jefferson Hooker is a tough-as-nails veteran police officer with the LCPD who turns his back on a gold badge and goes back to patrolling the streets and training recruits. Along with his young partners in blue, Hooker take on Lake City's toughest criminals.

Wandering in and out of he underbelly of Los Angeles, where criminals roam free under the veil of night or hide in the shadows of day, is routine for Lieutenant Carter Shaw and his special undercover task force. This team understands that to bring down a criminal, one must first get on their level.

In Southern California, a beachfront property was seized and turned into a residence for undercover cops. They are all top agents of the DEA, FBI, and Customs and they are living in this house unofficially known as "Graceland". Coming of a new graduating at the top of his class, FBI rookie, Mike Warren, could make the life of a legendary FBI agent Paul Briggs and the others, more complicated or it could reveal the truth. It is based upon actual events.

Grace, a morally and emotionally-conflicted undercover detective, is tormented by the possibility that her own actions contributed to her son’s death. Grace’s search for the truth is further complicated by her forbidden relationship with Jimmy, the crime boss who may have played a hand in the crime.

Sergeant “Pepper"” Anderson, an undercover cop for the Criminal Conspiracy Unit of the Los Angeles Police Department, poses undercover from mob girl to prostitute.

Vinnie Terranova does time in a New Jersey penitentiary to set up his undercover role as an agent for the OCB (Organized Crime Bureau) of the United States. His roots in a traditional Italian city neighborhood form the underlying dramatic base throughout the series, bringing him into conflict with his conservative mother and other family members while acting undercover as syndicate enforcer.

In 1972, the first Black female FBI agent heads to the Southwest and recruits a gutsy getaway driver in a bold effort to take down a growing crime syndicate.

The Inside is an American crime drama television series created by Tim Minear and Howard Gordon and produced by Imagine Television. The Inside follows the work of the FBI's Los Angeles Violent Crimes Unit, a division dedicated to investigating particularly dangerous crimes. The Inside initially aired on the Fox Network from June 8 to July 13, 2005. Although thirteen episodes were produced, Fox aired only seven episodes before canceling the series. All thirteen episodes were subsequently aired on Britain's ITV4 in 2006.

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.