The world is at war, and Harry Houdini wants to fight for his adoptive country. He might get the chance, when an old friend crashes his New York show.The Doctor is on the trail of a Central Powers spy ring, which has somehow acquired unearthly technology . But he is also keeping a dangerous secret. Finding himself on the run behind enemy lines, the world's greatest escape artist has to work out who he can trust - and fast. CAST: Colin Baker (The Doctor), Nicola Bryant (Peri), John Schwab (Harry Houdini), Fiona Bruce (Mrs Helen Smith/Hartmann), Mark Elstob (Oberst Brandt/Reynolds), Glen McCready (Professor Winter). Other parts played by members of the cast.