Cut and pasted from the Radio Times website:
The Tardis is captured by a spaceship salvage team, sending its systems into meltdown. As the Doctor introduces himself to the motley crew of galactic rag-and-bone men, he realises Clara is still trapped within his malfunctioning ship, so he persuades his new acquaintances to help find her, taking them deep into the heart of his beloved blue box. But their hopes of a straightforward rescue are dashed when it turns out Clara is not the only one down there - and if that weren't bad enough, they only have 30 minutes before the Tardis self-destructs.
Follow the links to the Radio Times features on this episode:
This is the trailer: