Details for Doctor Who - The Darkened Earth

Out this month from the digital only Short Trips line is a 6th Doctor and Constance story narrated by Miranda Raison.  You can order this release from the Big Finish website.
https://www.bigfinish.com/releases/v/the-darkened-earth-1563

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...

Producer Ian Atkins
Script Editor Ian Atkins
Executive Producers Jason Haigh-Ellery and Nicholas Briggs

Written By: John Pritchard
Directed By: Lisa Bowerman

Cast
Miranda Raison (Narrator)