The Tardis takes the Doctor and Turlough to the London of 1702, where a mysterious highwayman roams the streets, a local occultist has made contact with the dead and gentlemen of fashion are disappearing, only to find themselves in a chamber whose walls weep blood....

The time travellers become enmeshed in the hideous plan of Sir Nikolas Valentine, a gambler at the mysterious Diabola Club who always seems to have a winning hand....

Written by Mark Gatiss. Directed by Nicholas Briggs.