Barnaby Jones

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".

Remington Steele

Laura Holt, a licensed private detective, opens a detective agency but finds that potential clients refuse to hire a woman, however qualified. To solve the problem, Laura invents a fictitious male superior whom she names Remington Steele. Through a series of events that unfold in the first episode, "License to Steele," a former thief and con man, whose real name is never revealed, assumes the identity of Remington Steele. Behind the scenes, Laura remains firmly in charge.

King & Maxwell

Sean King and Michelle Maxwell aren't your typical pair of private investigators. As discredited Secret Service agents, their unique skills often give them a leg up on suspects and conventional law enforcement. He's charming and always one step ahead of the game; she's a fearless force to be reckoned with. As a team, they're unstoppable.

El pulpo negro

Sherlock Holmes

Sherlock Holmes uses his abilities to take on cases by private clients and those that the Scotland Yard are unable to solve, along with his friend Dr. Watson.

Randall and Hopkirk (Deceased)

Randall and Hopkirk (Deceased) is a British private detective television series. In the initial episode Hopkirk is murdered during an investigation, but returns as a ghost. Randall is the only main character able to see or hear him, although certain minor characters are also able to do so in various circumstances throughout the series.

77 Sunset Strip

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.

Gabriel's Fire

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.

The Rockford Files

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.

Agatha Christie's Poirot

From England to Egypt, accompanied by his elegant and trustworthy sidekicks, the intelligent yet eccentrically-refined Belgian detective Hercule Poirot pits his wits against a collection of first class deceptions.

Michael Shayne

Michael Shayne is an American detective television series starring Richard Denning that aired on NBC from September 30, 1960 to May 19, 1961.

High Tide

Brothers work as private investigators.

Dumas

Cassie & Co.

Cassie & Co. is an American drama series starring Angie Dickinson that aired on NBC in 1982.

Buddy Faro

Buddy Faro was the best private detective in the business, until he disappeared in 1978 after a case went bad. Twenty years later, he's brought back to Los Angeles by private detective Bob Jones and they reopen Buddy Faro Investigations.

Mike Hammer

Mickey Spillane's Mike Hammer, with Stacy Keach in the title role, is a television series that originally aired on CBS from January 28, 1984 to January 12, 1985. The series was 24 sixty minute episodes. The show follows the adventures of Mike Hammer, the fictitious private detective created by crime novelist Mickey Spillane, as he hunts down criminals on the mean streets of New York City.

Monk

Adrian Monk was once a rising star with the San Francisco Police Department, legendary for using unconventional means to solve the department's most baffling cases. But after the tragic (and still unsolved) murder of his wife Trudy, he developed an extreme case of obsessive-compulsive disorder. Now working as a private consultant, Monk continues to investigate cases in the most unconventional ways.

Banacek

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.

Mannix

Mannix is an American television detective series that ran from 1967 through 1975 on CBS. Created by Richard Levinson and William Link and developed by executive producer Bruce Geller, the title character, Joe Mannix, is a private investigator. He is played by Mike Connors. Mannix was the last series produced by Desilu Productions.

Surfside 6

Surfside 6 was an ABC television series which aired from 1960 to 1962. The show centered on a Miami Beach detective agency set on a houseboat and featured Troy Donahue as Sandy Winfield II; Van Williams as Kenny Madison; and Lee Patterson as Dave Thorne. Diane McBain co-starred as socialite Daphne Dutton, whose yacht was berthed next to their houseboat. Margarita Sierra also had a supporting role as Cha Cha O'Brien, an entertainer who worked at The Boom Boom Room, a popular Miami Beach hangout at the Fontainebleau Hotel, directly across the street from Surfside 6. Surfside 6 was in fact a real address in Miami Beach, where an unrelated houseboat was moored at the time; it can also be seen in the sweeping aerial establishing shot of the Fontainebleu in 1964's Goldfinger.