Everyone’s favorite impulsive British detective is back for another season.

The trailer for the fifth season of the BBC crime drama Luther premiered online Thursday, and it is stirring many questions from fans.

Set to an eerie downtempo rendition of “Toxic” by Britney Spears, the trailer follows Detective John Luther (Idris Elba) and D.S. Catherine Halliday (Wunmi Mosaku), a new addition to the cast, as they team up to solve the brutal murders taking place around London. The trailer also includes a brief appearance from ingenious murderer Alice Morgan (Ruth Wilson). Could a reunion between Luther and Morgan be on the horizon?

Aside from Elba, Luther also stars Michael Smiley, Dermot Crowley and Patrick Malahide. Elba’s performance as the obsessive detective earned him a Primetime Emmy Award nomination for Outstanding Lead Actor in a Miniseries or Movie in 2011, 2012, 2014 and 2016.

Watch the trailer for the fifth season of Luther below.

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