3.3 The Creeping Death by Roy Gill

London, 1952, and a deadly smog envelops the capital.

But something even more dangerous - and alien - is hiding within the mists.

When the Doctor and Donna get lost in the fog, they find a motley group of Londoners trying to make their way home.

Very soon, the stakes are raised, as death creeps along fume-choked streets, and not everyone will make it out alive...

This deluxe 5-disc slipcase edition is available exclusively from Big Finish, and strictly limited to 5000 numbered copies. The release includes a bonus disc of behind the scenes interviews and a new documentary, David Tennant at Big Finish.