Armitage runs a chemical company that is on the verge of producing a gas that causes temporary disability. Clearly the military want it but it is also sought by a group of Japanese. Both Armitage and Madam Greenfly hire different people in the same detective agency to guard the gas and steal it respectively... confusion, double crosses and hilarity ensue...
Professor Emil Keller has created a machine that can pacify even the most dangerous of criminals. But when the Doctor and Jo arrive at Stangmoor Prison for a demonstration, things start to go horribly wrong - especially when they discover that the Doctor's old enemy the Master is responsible for the machine.
A Chinese diplomat is kidnapped from a conference in Genève and the world peace is at risk. The trail leads to a hiding place in Denmark and the Danish secret service brings in their best agent, agent Smith, who has been in a psychiatric hospital since his last assignment. To accompany Smith they once again turn to novelty and party tricks salesman Frede Hansen, because they need an unrecognizable man to infiltrate the crime syndicate behind the kidnapping.
