Operation Berlin

Professor Wolff has invented a new, more efficient nuclear engine but on his way to discuss it with NATO he is kidnapped and taken to a KGB HQ in East Berlin with the plans. On the way to the HQ, there is an accident and so Professor Wolff is in a coma and only he can decipher the plans to the engine. You are John Blake, a British agent and you must get into East Berlin and to the KGB HQ to recover the plans before the Professor wakes up and is persuaded to decipher them or the Russians decipher it themselves.