HBO has released a new promo for Boardwalk Empire.

The nine-minute video offers a detailed recap of season four, ahead of the fifth and final season beginning on September 7.

The video, narrated by creator and executive producer Terence Winter, reviews the fates of every main character in the previous season.

In addition, Winter reveals that in season five, viewers can look forward to "new allegiances being formed, old scores being settled and Nucky Thompson's storyline coming full circle".

Boardwalk Empire returns to HBO on September 7 in the US and to Sky Atlantic on September 13 in the UK.

Digital Spy recently teamed up with Sky to determine the show's five most shocking moments.

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Reporter & Sub-Editor, Digital Spy Susannah is a freelance writer and sub-editor, specialising in the entertainment industry. She graduated in 2014, with a BA in English and American Literature and Creative Writing, and an MA in Creative Producing.  She’s been writing for Digital Spy ever since, after first getting involved through work experience, and has written hundreds of stories for the site on a range of topics, from The Sims to Doctor Who.  Susannah has also written for Reveal Magazine.  Her special interests are soaps (her Mastermind subject would be 2000s Coronation Street), Marvel and Star Wars. She can also quote far too many lines from Friends and Brooklyn Nine-Nine.