'Everything aboard this spaceship is suddenly endangered!' The TARDIS materialises in a tropical forest, and the Doctor, Steven and Dodo are surprised to find that it’s situated inside a vast spaceship. This is the distant future, and the last survivors from Earth are on a 700 year voyage to the planet Refusis II. Accompanying them are their mute, one-eyed servants: the Monoids. When Dodo unwittingly spreads her cold amongst the Monoids it proves deadly to them, and the travellers are accu...