Después de que un contable malverse su dinero, la ex-modelo Maddie Hayes decide vender los pocos negocios que todavía posee, entre ellos una agencia de detectives. Pero el detective privado David Addison quiere mantener su puesto de trabajo, por lo que convence a una reacia Maddie a formar una sociedad. Su primer caso les da pocas pistas para seguir: Maddie consigue un reloj roto de un hombre moribundo.

Dave y Maddie se enfrentan a una situación difícil cuando tienen que decirle a su cliente que el hijo que los contrató para encontrar es un asesino a sueldo.

Maddie cree que los diseños secretos de un cliente están siendo robados desde el plano astral por un psíquico.

Maddie se encapricha con el presentador de un programa de radio que al parecer ha sido asesinado mientras estaba en el aire.

Maddie y Dave se quedan atrapados en un tren lleno de aficionados al misterio cuando intentan que Agnes llegue a tiempo para su gran fin de semana resolviendo un asesinato preparado por un famoso autor.

Dave y Maddie encuentran un cadáver mientras trabajan para una agencia de cobro de morosos, pero desaparece sin dejar rastro cuando tratan de informar de ello.

El hermano mayor de David aparece en la ciudad, pasando mucho tiempo con Maddie y derrochando mucho dinero… que pertenecen a un despiadado traficante de drogas.

Una misteriosa mujer, que cubre su rostro con un velo, quiere que Maddie y David encuentren al hombre que la desfiguró hace años… para poder casarse con él.

Maddie descubre el paradero del hombre que la estafó y viaja a Buenos Aires para enfrentarse con él.

Orson Welles presenta un episodio que rinde homenaje al cine negro, al transformarse episodio de color a blanco y negro cuando Maddie y David sueñan versiones contradictorias de lo que sucedió en un caso de asesinato no resuelto en 1946.

Maddie le apuesta a David que no podrá comportarse como un adulto durante una semana entera. Mientras tanto, la madre de un pianista secuestrado contrata a la pareja para entregar el dinero del rescate.

Maddie teme que David acabe sufriendo al reencontrarse con un antiguo amor (Dana Delany), quien ya lo dejó una vez y ahora quiere salir de un mal matrimonio.

Una mujer que dice ser un duende pide a Maddie y David que la protejan de un hombre que quiere apoderarse de su olla de oro.

Maddie utiliza las primeras ganancias de la agencia para comprar un retrato de sí misma, pintado por un artista que nunca conoció y que se suicidó después de completar la pintura.

Maddie considera vender Luna Azul a una agencia de detectives corporativos, pero David espera anular el acuerdo resolviendo un gran caso, que involucra una agenda telefónica robado con números inusuales… como el del Papa.

Topisto encuentra a un bebé en su apartamento, el cual fue escondido por una mujer que huye de unos matones; David usa el número de teléfono de la agencia como una línea directa de Santa… para obtener ganancias.

Un cliente tiene una petición inusual: quiere que David y Maddie encuentren a su ideal de mujer para poder formar una pareja perfecta.

La señorita Topisto asiste a una cena-baile para detectives privados y acepta un trozo de papel de un hombre misterioso, creyendo que es su número de teléfono.

La viuda de un artista de escape pide a Maddie y David que vigilen el cadáver de su esposo hasta que sea incinerado, porque juró que volvería para matar a su esposa infiel.

Maddie sospecha que su padre está teniendo una aventura, por lo que David lo sigue… y está seguro de que a Maddie no le gustará lo que descubra.

Un enfermizo anciano planea su propio asesinato y quiere que Maddie y David sean testigos del crimen.

David se convierte en la comidilla del pueblo tras resolver grandes casos… gracias a los datos de una prostituta con un importante cliente que habla mientras duerme.

Un hombre quiere que Maddie y David eviten un asesinato por encargo que pagó… el suyo.

Cuando una estafadora escapa de la custodia de un detective corrupto, accidentalmente evita que un asesino asesine a un senador. Addison tiene la brillante idea de emplear a Camille, ya que su popularidad podría atraer nuevos clientes

David's estranged father makes a surprise visit to announce his upcoming wedding and to introduce his bride-to-be, who comes as a shock to David.

A man hires Dave and Maddie to find his wife, who's been making mysterious late night phone calls to him, the same wife he's sure he killed and buried in the forest.

Dave and Maddie agree to each arrange what they consider to be an ideal evening for the other, but the concert tickets Dave buys from a scalper get them into nothing but trouble.

Dave and Maddie are hired by a married woman to find the man she has been sharing a torrid romantic correspondence with and make sure he understands the arrangement is over.

A priest asks Dave and Maddie to find a woman he's become infatuated with during confession and whose latest revelation was her intention to kill herself.

Maddie becomes consumed with curiosity when David announces he must fly back to New York to attend the funeral of his former wife's brother.

A boy hoping to watch Moonlighting but forced to study Shakespeare instead daydreams about the cast performing their own version of The Taming of the Shrew complete with Petruchio Dave and Kate Maddie.

A depressed Maddie gets a chance to see what her life and the rest of Blue Moon staff would be like if she had sold the agency as she originally intended.

Rona Barrett investigates the rumors about discord among the principals at the Blue Moon Detective agency.

Ms. Dipesto tries to solve a haunted house case refused by Dave and Maddie to show Bert Viola that she's just as good a detective as he is.

Maddie's strange mood has David worried so he spends the evening following her, but ends up involved in a murder.

Dave and Maddie quarrel over Sam as they keep watch on a man for his mistress, who's convinced he's two-timing her-with his wife.

Maddie feels more and more confused about Sam and Dave after an all-night stakeout with Dave ends in an early morning proposal from Sam.

Sam confronts Dave about Maddie, and tells him he's not good enough for her.

Maddie tries to ignore the previous night as she and David tackle a new case: a woman wants evidence that her fiance loves her and not her father's money.

After a month of intimacy, Maddie begins to question just where this relationship with David is headed.

With Maddie in Chicago, Dave feels very sympatico with a client who offers $10,000 if they can locate the woman he spent one memorable night with.

David recruits Bert Viola as his detecting companion in a case concerning a man who failed to show up for his wedding while Maddie continues to brood in Chicago.

Maddie's parents throw a party for her in Chicago while Dave and Bert party it up in LA.

Ms. Dipesto lets Maddie's secret slip, so Dave frantically tries to fly to Chicago, but he gets waylaid and makes an unexpected side trip to prison under another man's name.

Ms. Dipesto lets Maddie's secret slip, so Dave frantically tries to fly to Chicago, but he gets waylaid and makes an unexpected side trip to prison under another man's name.

Mr. Hayes visits Dave after his return to the agency to subtly hint that he should take some responsibility for Maddie's unborn child.

Ms. Dipesto's mother returns from a visit to Mexico carrying more than she realizes and becomes the target for several different parties.

Dave searches for a suitable Lamaze partner so he can be prepared for Maddie's delivery.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

Dave is skeptical about the existence of Walter Bishop and bugs Maddie about it as they work on case for a woman who wants to buy off her husband's mistress.

Maddie's confused and worried: Dave has insisted on throwing a bachelor party for Walter and a huge formal wedding for her.

Bert, bored on an all-night stakeout, dreams about how nice it would be to live with Agnes, but her hesitation when he actually asks her hurts his tender ego.

Dave and Maddie try to recover their working relationship while dealing with the romantic writings of a man obsessed by one woman.

An angel from above visits Baby Hayes as he waits to be born and gives him the low down on his parents and their relationship.

Maddie takes on several new cases in an effort to bury her sorrow, including one where a woman is convinced that her husband is still in love with someone from his past.

Maddie and David struggle to find a new footing for their relationship while working on a case for a woman whose husband of one week returns after a ten year absence.

Maddie and David are hired by a disfigured man who has become a recluse and needs the detectives' help in proving that a plastic surgeon wantonly caused his disfiguration.

The office divides along gender lines when Maddie takes on a case for a woman who shot her boss for sabotaging her career when she refused his sexual advances.

A ruthless divorce lawyer comes to Blue Moon for help in reconciling a couple she helped split up, and Maddie tries to buy David a present.

Dave and Maddie keep company with a popular corpse and visit a graveyard when a man seeking a bodyguard drops dead in their office.

Maddie is sympathetic while David is skeptical when his brother shows up asking for help tracking down his fiancee's former partner, who has absconded with all their company assets.

Maddie resists, but David plunges ahead when a dying burglar asks for their help in proving he committed the perfect crime 25 years earlier.

David goes beyond the call of duty to help entertain Maddie's cousin Annie, and Maddie realizes that David may be over his obsession with her.

Burt pouts and frantically tries to solve the crime when Agnes is forced to miss his family reunion because she won't vote to convict a man of murdering his partner / lover.

As the sole eyewitness to a murder, Maddie is given police protection. But David suspects that her handsome young bodyguard is setting her up for death.

Dave breaks it off with Annie when her husband comes to California, everyone attends the wedding of Burt and Agnes, and the agency closes its doors for a final time as everyone tries to figure out why it all had to end.