BBC's gripping crime show Luther is set to return for a fifth season. It's been two years since season 4 and we're excited. We've gathered everything we know so far about the official start date, new trailer, exclusive clips and more.

When is Luther season 5 on?

Luther is back on BBC1 now after debuting on New Year's Day. It airs from 9-10pm, and runs for four episodes, with one airing each day over January 1-4.

Luther season 5 trailer

The new trailer for season 5 is finally here. It's dark, eerie and has us on the edge of our seats. See for yourself:

On 12 November, The BBC also released this clip from the new season:

The BBC originally released a teaser for the fifth season on 18 June, 2018 on YouTube. We see Luther donning his iconic coat and breathing heavily as he limps down a dark, mysterious corridor.

Who’s in the Luther season 5 cast?

We’re expecting new faces in the upcoming season, with Wunmi Mosaku joining the cast as Luther’s assistant D.S. Catherine Halliday. Mosaku's previous work includes BBC’s Damilola, Our Loved Boy for which she won a BAFTA.

Mosaku replaces Rose Leslie’s DS Emma Lane (whom you may recognize from Game of Thrones). Leslie is not expected to return.

Hermione Norris from Cold Feet and Spooks will be another new cast member, playing psychiatrist Dr. Vivien Lake.

Cast members from past seasons, Dermot Crowley (DSU Martin Schenk), Michael Smiley (Benny “Deadhead” Silver) and Patrick Malahide (who played the gangster George Cornelius from season 4) are returning as well.

Ruth Wilson, who plays the ever-menacing Alice Morgan, will also be returning in season 5.

How to watch the last season

The first four seasons of Luther are available on Netflix. As of 19 October You can also watch it on the BBC iPlayer for free (here's how to watch BBC iPlayer from abroad).

You can own the first four season on Blu-ray or DVD as a box set from Amazon starting at £11.99 in the UK or $40.74 in the US