The Master arrives on Earth at a circus run by a man named Rossini and steals a dormant Nestene energy unit from a museum. He reactivates it using a radio telescope and uses his hypnotic abilities to take control of a sm…

The Doctor and Sarah arrive in a quarry during blasting operations and when Sarah is buried under rubble, she discovers a stone hand.

The Doctor and Sarah reach Earth and try to warn the research centre about the Kraal invasion before Styggron unleashes his virus.

Finding out-of-season Brighton beach somewhat lacking, the Doctor and Romana travel to the leisure planet Argolis - but there strange experiments are taking place.

影片改编自罗伯特·金梅尔·史密斯1984年出版的同名童书，故事围绕一个小男孩的“卧室保卫战”展开。