Following a skirmish in deep space, two alien spacecraft have crash landed on a barren planet in Galaxy Four. The Drahvins are a race of beautiful females, led by the imperious Maaga. The Rills are hideous tusked monstrosities, accompanied by their robotic servants, the Chumblies. When the Doctor arrives, with companions Vicki and Steven in tow, he discovers that the planet will explode in two days' time. The Drahvins desperately seek his help in escaping the planet and the belligerent Rills. But things are not always as they seem. Maureen O’Brien, who played Vicki in the BBC TV series, reads William Emms’s complete and unabridged novelization, first published by Target Books in 1986.