Released: Friday 31st August 2018
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Big Finish Release

Featuring: Miranda Raison

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...
Synopsis Source: Doctor Who Guide