Illegal Alien

The Blitz is at its height. As the Luftwaffe bomb London, Cody McBride, ex-pat American private eye, sees a sinister silver sphere crash-land. He glimpses something emerging from within. The military dismiss his account of events - the sphere must be a new German secret weapon that has malfunctioned in some way. What else could it be? Arriving amid the chaos, the Seventh Doctor and Ace embark on a trail that brings them face to face with hidden Nazi agents, and encounter some very old enemies.