True Detective is an American anthology crime drama television series created by Nic Pizzolatto. The series, broadcast by the premium cable network HBO in the United States, premiered on January 12, 2014. Each season of the series is structured as a self-contained narrative, employing new cast ensembles, and following various sets of characters and settings.

The first season, starring Matthew McConaughey, Woody Harrelson, Michelle Monaghan, Michael Potts, and Tory Kittles, aired in 2014. It takes place in Louisiana and follows a pair of Louisiana State Police detectives, and their pursuit of a serial killer with occult links over a 17-year period.

The second season, starring Colin Farrell, Rachel McAdams, Taylor Kitsch, Kelly Reilly, and Vince Vaughn, aired in 2015. It is set in California, and focuses on three detectives from three cooperating police jurisdictions and a criminal-turned-businessman as they investigate a series of crimes they believe are linked to the murder of a corrupt politician.

The third season, starring Mahershala Ali, Carmen Ejogo, Stephen Dorff, Scoot McNairy, and Ray Fisher, aired in 2019. It takes place in the Ozarks over three time periods as a pair of Arkansas State Police detectives investigate a macabre crime involving two missing children.

The fourth season, titled True Detective: Night Country and starring Jodie Foster and Kali Reis, aired in 2024. It takes place in Alaska and follows the investigation into the sudden disappearance of a team of eight men from a research station. Issa López serves as writer and director, marking Pizzolatto's first time as neither writer nor showrunner.

The first season received widespread acclaim and earned high ratings for HBO. It received numerous awards, chiefly for its acting, cinematography, writing, and direction. Reception to the second season was more divided, although the show maintained high viewership. The third season received positive reviews, but saw a drop in viewership. Night Country earned the highest viewership ratings for the series, and received widespread critical acclaim. It earned the highest number of Emmy Award nominations for the series.

A fifth season, with López returning as the showrunner, is in development.