Moonlighting is an American comedy drama television series that aired on ABC from March 3, 1985, to May 14, 1989. The network aired a total of 67 episodes. Starring Cybill Shepherd and Bruce Willis as private detectives, Allyce Beasley as their quirky receptionist, and Curtis Armstrong as a temporary worker (and later junior detective), the show was a mixture of drama, comedy, mystery, and romance, and was considered to be one of the first successful and influential examples of comedy drama, or "dramedy", emerging as a distinct television genre.

The show's theme song was co-written and performed by singer Al Jarreau and became a hit. The show is also credited with making Willis a star and relaunching Shepherd's career after a string of lackluster projects. In 1997, the episode "The Dream Sequence Always Rings Twice" was ranked number 34 on TV Guide's 100 Greatest Episodes of All Time. In 2007, the series was listed as one of Time magazine's "100 Best TV Shows of All-Time". The relationship between the characters David and Maddie was included in TV Guide's list of the best TV couples of all time.

The series revolved around cases investigated by the Blue Moon Detective Agency and its two partners, Madolyn "Maddie" Hayes (Shepherd) and David Addison (Willis). The show, with a mix of mystery, sharp dialogue, and sexual tension between its leads, introduced Willis to the world and brought Shepherd back into the spotlight after a nearly decade-long absence. The characters were introduced in a two-hour pilot episode.

The show's storyline begins with the reversal of fortune of Maddie Hayes, a former model who finds herself bankrupt after her accountant steals all her liquid assets. She is left with several failing businesses formerly maintained as tax writeoffs, one of which is the City of Angels Detective Agency, helmed by the carefree David Addison. Between the pilot and the first one-hour episode, David persuades Maddie to keep the business and run it as a partnership. The agency is renamed Blue Moon Investigations because Maddie was most famous for being the spokesmodel for the Blue Moon Shampoo Company. In many episodes, she was recognized as "the Blue Moon shampoo girl", if not by name.

In his audio commentary for the season-three DVD, creator Glenn Gordon Caron says that the inspiration for the series was a production of The Taming of the Shrew he saw in Central Park starring Meryl Streep and Raúl Julia. The show parodied the play in the season-three episode "Atomic Shakespeare".

The series was created by Glenn Gordon Caron, one of the producers of the similar Remington Steele, when he was approached by ABC executive Lewis H. Erlicht. Erlicht liked the work Caron had done on Taxi and Remington Steele and wanted a detective show featuring a major star in a leading role who would appeal to an upscale audience. Caron wanted to do a romance, to which Erlicht replied, "I don't care what it is, as long as it's a detective show."

The tone of the series was left up to the production staff, resulting in Moonlighting becoming one of the first successful TV "dramedies"— dramatic-comedy, a style of television and movies in which an equal or nearly equal balance of humor and serious content is used. The show made use of fast-paced, overlapping dialogue between the two leads, harking back to classic screwball comedy films such as those of director Howard Hawks. These innovative qualities resulted in its being nominated, for the first time in the 50-year history of the Directors Guild of America, for both Best Drama and Best Comedy in the same year (both in 1985 and 1986).

Moonlighting frequently broke the fourth wall, with many episodes including dialogue that made direct references to the scriptwriters, the audience, the network, or the series itself. (For example, when a woman is trying to commit suicide by jumping into a bathtub with a television playing The Three Stooges, Addison says, "The Stooges? Are you nuts? The network'll never let you do that, lady!")