Fortitude will end after its third series, set to air later this year.

Sky announced today (January 25) that the Arctic thriller will wrap up with just four episodes. Filming's due to start soon.

A number of familiar faces will be back for the miniseries, including Dennis Quaid, Richard Dormer, Sienna Guillory, Luke Treadaway, Alexandra Moen, Mia Jexen and Bjorn Hlynur Haraldsson.

And you can expect new cast members too, as two police officers from Oslo are sent to Fortitude to investigate the murder of Governor Erling Munk (Ken Stott).

"I can't wait to get back to this place," said Richard Dormer. "I love this world. A brilliant cast and crew.

Sky Atlantic

"Returning to Fortitude always feels like coming home. And my old friend Dan is waiting for me. And he's just got this big grin on his face."

And Sky's head of drama Anne Mensah added that Simon Donald has "created this four-hour special event", promising viewers "the perfect ending" to the mystery.

Fortitude series 3 will air on Sky Atlantic and NOW TV in the UK and Ireland, and you'll also be able to watch it on Sky Atlantic in Italy, Germany and Austria.

Elsewhere, Sky's also announced a new eight-part street racing drama called Curfew with Sean Bean, Adrian Lester, Malachi Kirby and Phoebe Fox, and historical drama Catherine the Great, a co-production with HBO starring Helen Mirren in the title role.

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