Matthew McConaughey and Mahershala Ali have both starred in a series of which US crime drama?

"True Detective" is an American anthology crime drama television series created and written 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, 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 third season aired in 2019, starring Mahershala Ali, Carmen Ejogo, Stephen Dorff, Scoot McNairy, and Ray Fisher, takes place in the Ozarks over three separate time periods as a pair of Arkansas State Police detectives investigate a macabre crime involving two missing children.