Nigel Robinson is an English author known for his science fiction and fantasy writing, as well as his novelizations for children and adults, particularly of the "Doctor Who "series.
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The Malgarians are known as a vicious, belligerent species - so when the TARDIS brings the Doctor and Peri to their homeworld, they are greeted by a pacifistic population. What has changed, and what is the secret of the Sisters of Serenity?