The Masque of Mandragora

An encounter with the living energy structure known as the Mandragora Helix leads the TARDIS to 15th Century Italy. Between palace intrigue, the machinations of a sinister cult and a rogue fragment of Helix energy, the Fourth Doctor and Sarah have their hands full. There is not much time, for when Mandragora swallows the Moon, it will be time to strike.

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The Sea Devils

The Doctor and Jo visit the Master in his high-security prison on an island off the south coast of England. The governor, Colonel Trenchard, says ships have been disappearing mysteriously at sea. The Doctor discovers that Trenchard and the Master are in league to contact the Sea Devils, a reptilian race in hibernation beneath the sea, who have been awoken by recent work on a sea fort. The Master intends to use his new allies to help him conquer the world.

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The Web of Fear

The TARDIS narrowly escapes being engulfed in a cobwebby substance in space. It arrives in the London Underground, the tunnels of which are being overrun by the web and the Great Intelligence’s robotic Yeti.

The time travellers lean that this crisis was precipitated when Professor Travers, whom they first met in the Himalayas, some thirty years earlier, accidentally caused one of the Yeti to be reactivated, opening the way for the Intelligence to invade again.

The travellers work alongside army forces – led initially by Captain Knight, and then by Colonel Lethbridge-Stewart – as they battle the alien menace, hampered by the fact that one of their number has fallen under the Intelligence’s influence and is a traitor in their midst.

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