Things are very confusing in Calcutta right now. Undercover activities, spy trails that criss-cross, and many unseen dangers. But this much we do know. Somewhere in Calcutta is a master spy - a Nazi enemy agent. That German operator is the evil genius who is helping the Japs in nearby Burma to improve their deadly robot bombs. That is the enemy Terry, Flip and Pat want to catch, by working with the British secret agents in Calcutta. But all has not gone well, nor will it, as you will see in today's episode!