There's something uniquely captivating about a detective story where the plot revolves around an ex-girlfriend. These films not only delve into the complexities of past relationships but also weave them into thrilling mysteries. Here's a selection of ten detective films where the ex-girlfriend isn't just a footnote but a central figure in unraveling the mystery, offering a blend of suspense, nostalgia, and emotional depth.

The Big Sleep (1946)
Description: Philip Marlowe's investigation into a blackmail case leads him to an ex-girlfriend, adding layers of intrigue and romance to this classic noir.
Fact: The film's plot is famously convoluted, with even the director admitting he didn't fully understand it. Lauren Bacall's character was originally intended for a different actress.


The Long Goodbye (1973)
Description: A modern take on Raymond Chandler's detective, Philip Marlowe, where his ex-girlfriend's involvement in a murder case brings him back into her life.
Fact: Robert Altman's adaptation was initially panned but has since gained a cult following. The film's ending was changed from the book, causing controversy.


The Two Jakes (1990)
Description: A sequel to "Chinatown," where Jake Gittes' investigation into a land deal leads him to confront his ex-girlfriend's past.
Fact: Jack Nicholson directed and starred in this film, which was originally meant to be the second part of a trilogy.


The Deep End (2001)
Description: A mother goes to extreme lengths to protect her son, involving her in a web of deceit with her ex-girlfriend's lover.
Fact: The film was shot in sequence to capture the emotional journey of the characters authentically.


Gone Girl (2014)
Description: This film is a masterclass in suspense, with the ex-girlfriend's disappearance driving the entire narrative. It's a psychological thriller that keeps you guessing until the very end.
Fact: The film was adapted from Gillian Flynn's novel, and Flynn herself wrote the screenplay. The infamous 'Cool Girl' monologue was improvised by Rosamund Pike.


The Girl on the Train (2016)
Description: A tale of an alcoholic woman whose life spirals into chaos when she becomes entangled in a missing person investigation involving her ex-husband's new wife.
Fact: The film was shot in New York City, despite the story being set in London. Emily Blunt's performance was critically acclaimed for its depth and intensity.


Basic Instinct (1992)
Description: A detective becomes romantically involved with a suspect in a murder case, who happens to be his ex-girlfriend, leading to a dangerous game of cat and mouse.
Fact: The film was controversial for its explicit content, and the infamous leg-crossing scene by Sharon Stone was reportedly filmed without her knowledge.


The Last Seduction (1994)
Description: A femme fatale uses her ex-husband's money to seduce and manipulate a man into committing a crime, showcasing the dark side of past relationships.
Fact: Linda Fiorentino's performance was so compelling that she won the New York Film Critics Circle Award for Best Actress.


The Black Dahlia (2006)
Description: Two cops investigating the infamous Black Dahlia murder find themselves entangled with their ex-girlfriends, complicating the case.
Fact: The film was based on a novel by James Ellroy, who was inspired by the real-life unsolved murder of Elizabeth Short.


The Ice Harvest (2005)
Description: A mob lawyer and his partner steal a large sum of money, but their plans are complicated by an ex-girlfriend and a series of unfortunate events.
Fact: The film was released on Christmas Day, despite its dark, noir setting, which was a bold marketing move.
