A teaser for the fifth season of Luther has been revealed.

The upcoming season of the award-winning, Idris Elba-starring British crime drama doesn’t have a release date yet, but we do know a few details about it.

Wunmi Mosaku will portray a new recruit, D.S. Catherine Halliday.

The season’s description reads: As a series of monstrous killings becomes ever more audacious, Luther and new recruit Halliday are confounded by a tangle of leads and misdirection that seems designed to protect an unspeakable horror. But even as the case brings him closer than ever to the nature of true evil, a reluctant Luther must also face the ghosts of his own past. Striding back into the line of fire, he must choose who to protect… and who to sacrifice. Whatever his next move, it will have devastating consequences for those around him – and will change John Luther forever.

Watch the teaser below: