In Victorian England, the Great Detective, Madame Vastra, her resourceful spouse, Jenny Flint, and their loyal valet, Strax, solve conundrums, fight injustice and capture criminals - but an enemy has taken up residence undetected. The secret of the shape-shifting trespassers will now be revealed. 2.7 Doppelgängers by Ken Bentley - After being imprisoned by a shapeshifting foe, Jenny has escaped through the London sewers and returned to Paternoster Row. Meanwhile, her captor (now disguised as Doppel-Jenny) infiltrates Paternoster Row with murderous intent! 2.8 Jellyfish! by Neve McIntosh and Dan Starkey - The Gang head to the coast for Madame Vastra to convalesce. But their holiday proves far from restful. This Cornish village is home to suspicious locals, strange storms and wreckers. Most dangerous of all, something lurks in the seas – something with a mysterious hold over Vastra. 2.9 The Houseguest by Matt Fitton - Vastra, Jenny and Strax return to London to find Paternoster Row changed. Houses lie empty, a crimewave grips the neighbourhood. A new criminal mastermind rules the underworld. What’s more, Number 13 has an unexpected houseguest. And he claims to be the Doctor.