The BBC has released the official story details for the ninth episode of Doctor Who‘s new season.

Written by Sherlock co-creator Mark Gatiss, ‘Sleep No More’ will air at 8.15pm on Saturday 14 November on BBC One.

The synopsis reads: “This terrifying story is assembled from footage discovered in the wreckage of Le Verrier Space Station.”

Directed by Justin Molotnikov (Merlin), the episode’s guest cast includes Reece Shearsmith (Inside No. 9), Banana star Bethany Black, Elaine Tan (Eastenders), Neet Mohan (Desert Dancer), and Paul Courtenay Hyu (Coronation Street).

Doctor Who showrunner Steven Moffat has previously teased: “This is footage collected from a space rescue mission. If you value your life, your sanity, and the future of your species, DO NOT WATCH IT.”

He teased: “It wasn’t possible to do such an episode ten years ago, when the show came back and Mark [Gatiss] has been rewriting it over and over again to make it perfect.”

Writer Mark Gatiss has revealed: “I thought to myself, ‘I’m going to write this as it it was a horror movie, and then I’ll pull back,’ but I really didn’t. That’s the truth of it. It’s wonderfully scary, I’m thrilled with how scary it is. I love the monsters, they’re very creepy.”

He added: “One of the the things I love about doing Doctor Who, of many things, is the chance to do something unusual and keep pushing the format after fifty-odd years, it’s great that it can still do that. It really suits it.”

> Buy Season 9 on DVD on Amazon.

> Buy Season 9 on Blu-ray on Amazon.

Season 9 continues this Saturday on BBC One with ‘The Zygon Invasion’.

> Here’s everything we know about Season 9 so far.

Are you looking forward to ‘Sleep No More’? Let us know below…