Movies like Zero Effect

Harry Crumb is a bumbling and inept private investigator who is hired to solve the kidnapping of a young heiress which he's not expected to solve because his employer is the mastermind behind the kidnapping.

A spoof of the entire 1940s detective genre. San Francisco private detective, Lou Pekinpaugh is accused of murdering his partner at the instigation of his mistress—his partner's wife.

While attending a major horse race with their young son, Nick Jr., Nick and Nora Charles witnesse a shocking murder from the crowded grandstand. What first appears to be an isolated killing soon leads to a maze of corruption, blackmail, gambling scandals, and criminal intrigue. As Nick investigates, he encounters suspicious bookmakers, dishonest officials, rival gangsters, and a mysterious killer determined to stay ahead of the law. Nora, as always, is never far from the action, bringing her quick wit and fearless curiosity to the case.

When renowned crime novelist Harlan Thrombey is found dead at his estate just after his 85th birthday, the inquisitive and debonair Detective Benoit Blanc is mysteriously enlisted to investigate. From Harlan's dysfunctional family to his devoted staff, Blanc sifts through a web of red herrings and self-serving lies to uncover the truth behind Harlan's untimely death.

Private detective Moses Wine is hired by his former college girlfriend to investigate a political smear campaign and he sets out to find out who is responsible, with deadly results.

Jane Marple solves the mystery when a local woman is poisoned and a visiting movie star seems to have been the intended victim.

An over-the-hill gumshoe in Los Angeles seeks to avenge the killing of an old pal, another detective who was involved in a case concerning a murdered broad, stolen stamps, a nickel-plated handgun, a cheating dolly, and a kidnapped pussycat.

Caught in the middle of a bank robbery, a slacker and a bank employee become the ones who arbitrate the intense situation.

A shy San Francisco librarian and a bumbling cop fall in love as they solve a crime involving albinos, dwarves, and the Catholic Church.

Upon waking up to the news that the man she’d gone on a date with the previous night has been murdered, a young woman with only a faint memory of the night’s events begins to suspect that she murdered him while attempting to resist his advances.

When a priceless crown is stolen during a benefit gala held by the Lawrenceton library, Aurora and the Real Murders Club must investigate who would kill to get their hands on it.

Spiritualist Blanche Tyler and her cab-driving boyfriend encounter a pair of serial kidnappers while trailing a missing heir in California.