Atom Bomb Blues

Los Alamos, New Mexico, 1945. The Second World War is
coming to its bloody conclusion, and in the American desert the race is
on to build an atomic bomb. The fate of the world is at stake in more
ways than one.

Someone, or something, is trying to alter the course of history at
this most delicate point. And destroy the human race. Posing as a
nuclear scientist with Ace as his research assistant, the Doctor plays
detective among the Manhattan Project scientists, while desperately
trying to avoid falling under suspicion himself.

As the minutes tick away to the world's first atom bomb blast, the
Doctor and Ace find themselves up to their necks in spies, aliens of the
flying saucer variety, and some very nasty saboteurs from another
dimension.

This adventure features the Seventh Doctor and Ace, and is written
by Andrew Cartmel, who was Script Editor for this era of the television
programme.