The Doctor answers a psionic distress call sent from England in the 1920s. There, in the environs of a fairground, he is reunited with an old friend: Harry Houdini. To Adric and Nyssa the name means very little, but to the Doctor's companion Tegan he is a legend. Escape artist extraordinaire, Houdini's reputation will last for decades. But how does Houdini know so much about Tegan herself? Is it really just guesswork, as he says? Is Houdini right to be concerned about the fairground's fortune teller, who claims to have supernatural skills? Both he and the Doctor suspect an alien influence may be at work. What neither the Doctor nor his friends realise is that, somewhere in the shadows, a sinister and all too familiar presence is lying in wait for them...Celebrating 50 years of Doctor Who, a brand new adventure for the Fifth Doctor.