Doctor Who – The Darkened Earth narrated by Miranda Raison is out now.

Mrs Constance Clarke has faced perils on many planets, but now she finds herself in the most dangerous place on Earth. A place like home, yet terrifyingly different, where ordinary decent folk might hand her over to a dreadful fate. And as night falls, she and the Doctor realise that something is on the prowl outside, a creature darker than the dark. And hungry…

Along with this release your purchase unlocks a music suite accessible on the Big Finish website and the Big Finish app.

Music and sound designer David Roocroft tells us about crafting the soundscape for this unique tale: “The Darkened Earth marks the second time I’ve had the privilege of working on a John Pritchard-scripted Doctor Who story (the first being the recent Companion Chronicle, The Iron Maid), and once again, John’s gift for horror inflections have informed how I approached the music.

“Central to my work on The Darkened Earth was dividing the score into two distinct camps: when the creature is absent, and when the creature is present.

“I felt it was important that the music reflects the creature's effect, here eliminating melody for the times it feeds. Consequently, there’s a big difference between the bright, more orchestral-leaning passages of the score and the sludgy, atonal sequences that denote the creature’s presence.

“I felt this was especially pertinent to emphasising the creature’s ‘otherness’ to Constance – in the absence of the creature, even when I’m attempting to evoke a sense of the approaching uncanny, the arrangements retain a footing in the kind of instrumentation that would have been recognisable to Constance, whereas the creature’s soundtrack would be distinctly ‘other’ and outside the auditory language of someone more used to life (and music) in the 1940s.”

You can get this new adventure for £2.99 on download only out now from Big Finish. Or you can save money with a subscription to the Short Trips range and get 12 stories for £30 a year.

Coming next in the Short Trips range, Jackie Tyler (Camille Coduri) returns with the Meta-Crisis Doctor, who isn’t the same as the Doctor we know and love…. all will change on a Flight Into Hull!

Jackie Tyler's lost a close friend, and this new Doctor is only a half-hearted replacement for him.

But as she tries to put the events of Big Ben behind her and take a well-earned break, others have spotted an opportunity. A well-intentioned, far-reaching plan is underway.

But Jackie Tyler isn't the woman she was...