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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.

Alex Cross is a brilliant but flawed homicide detective and full of contradictions. A doting father and family man, Cross is single-minded to the point of obsession when he hunts killers. He is desperate for love, but his wife’s murder has left him too damaged to receive it.

Barnaby Jones is a television detective series starring Buddy Ebsen and Lee Meriwether as father- and daughter-in-law who run a private detective firm in Los Angeles. The show ran on CBS from January 28, 1973 to April 3, 1980, beginning as a midseason replacement. William Conrad guest starred as Frank Cannon of Cannon on the first episode of Barnaby Jones, "Requiem for a Son" and the two series had a two-part crossover episode in 1975, "The Deadly Conspiracy".

Stu Bailey and Jeff Spencer are the wisecracking, womanizing private-detective heroes of this Warner Brothers drama. They work out of an office located at 77 Sunset Strip in Los Angeles, California, right next door to a snazzy restaurant where Kookie works as a valet. The finger-snapping, slang-talking Kookie occasionally helps Stu and Jeff with their cases, and eventually becomes a full-fledged member of the detective agency. Rex Randolph and J.R. Hale also join the firm, and Suzanne is their leggy secretary.

Baretta is an American detective television series which ran on ABC from 1975 to 1978. The show was a milder version of a successful 1973–74 ABC series, Toma, starring Tony Musante as chameleon-like, real-life New Jersey police officer David Toma. While popular, Toma received intense criticism at the time for its realistic and frequent depiction of police and criminal violence. When Musante left the series after a single season, the concept was retooled as Baretta, with Robert Blake in the title role.

New York Undercover is an American police drama The series stars Detective J.C. Williams and Detective Eddie Torres, two undercover detectives in New York City's Fourth Precinct who were assigned to investigate various crimes and gang-related cases.

A war veteran turned private detective operates out of a tiny office in London’s Denmark Street. Although wounded both physically and psychologically, his unique insight and background as a military police investigator prove crucial in solving complex crimes that have baffled the police. Based on the bestselling novels written by J.K. Rowling under the pseudonym Robert Galbraith.

Inspector Morse is a detective drama based on Colin Dexter's series of Chief Inspector Morse novels. The series starred John Thaw as Chief Inspector Morse and Kevin Whately as Sergeant Lewis, as well as a large cast of notable actors and actresses.

A dark psychological crime drama starring Idris Elba as Luther, a man struggling with his own terrible demons, who might be as dangerous as the depraved murderers he hunts.

A recent widower and acclaimed poet, enigmatic Inspector Adam Dalgliesh employs his exceptional empathy and insight to plumb the darker depths of the human psyche while investigating complex crimes in 1970s England.

A bald, lollipop sucking police detective with a fiery righteous attitude battles crime in New York City.

Mystery and suspense series based on Robert Parker's "Spenser" novels. Spenser, a private investigator living in Boston, gets involved in a new murder mystery each episode.

A thrilling drama based on the novels by Peter Robinson. Stephen Tompkinson and Andrea Lowe star as the tenacious and stubborn Chief Inspector Alan Banks and the feisty and headstrong Detective Sergeant Annie Cabbot.

Police Detective Sgt. Joe Friday and his partners investigate crimes in Los Angeles.

Cranky but likable L.A. PI Jim Rockford pulls no punches (but takes plenty of them). An ex-con sent to the slammer for a crime he didn't commit, Rockford takes on cases others don't want, aided by his tough old man, his lawyer girlfriend and some shady associates from his past.

An American police procedural chronicling the work of a fictional version of the Baltimore Police Department's Homicide Unit.

The hard-boiled saga of hair-trigger cop Lieutenant Mike Torello and his obsessive pursuit of ruthless gangster Ray Luca.

The early days of a young Endeavour Morse, whose experiences as a detective constable with the Oxford City Police will ultimately shape his future.

Keeping these streets clean is a Herculean task, enough to demoralize even the keenest rookie – but there’s a reason why this hotchpotch of committed cops are on this force, on this side of town. Drug labs, arsonists, neo-Nazis and notorious murderers are all in a day’s work for this close-knit team, led by the dizzyingly capable but unquestionably unhinged DI Vivienne Deering. But when a particularly twisted serial killer emerges it leaves even the most hardened of these seasoned coppers reeling.

Banacek is an American detective TV series starring George Peppard that aired on the NBC network from 1972 to 1974. The series was part of the rotating NBC Wednesday Mystery Movie anthology. It alternated in its time slot with several other shows but was the only one to last beyond its first season.