Trolls were creatures from Earth myths and legends. They were especially popular in Iceland. (AUDIO: The Hunting Ground) Trolls existed in the Land of Fiction. Some of them were converted into Cybermen. (AUDIO: Legend of the Cybermen) The Fomoir of Tír na n-Óg resembled trolls by design. (PROSE: Cat's Cradle: Witch Mark) The name was also used as an insult; Susan Foreman called the Master a troll. (PROSE: Legacy of the Daleks)

Sontarans were often compared to trolls in terms of appearance. (PROSE: Doctor Who and the Time Warrior, The Eight Doctors) Nyssa called them "a race of troll-like warmongers," and Tegan Jovanka said they looked like "stumpy, cross-eyed trolls." (AUDIO: Heroes of Sontar) When the Tenth Doctor engaged contact with General Staal during the Sontaran invasion of Earth, UNIT Colonel Alan Mace likened the appearance of the Sontaran to that of a troll. (TV: The Poison Sky)

Trolls also formed the basis for a popular brand of toys on Earth. When she was a child, Jo Grant had "an army of gonks and trolls" but even then found dolls creepy. (AUDIO: The Doll of Death)

The Sixth Doctor described the Vilal as being "troll-like". (AUDIO: Quicksilver)

Little Louie resembled a troll. (PROSE: Mean Streets)

Peri Brown called the Javaman "[an] ugly little troll." (PROSE: Turnabout is Fair Play)

Trolls appeared in The True History of Planets. (PROSE: Mad Dogs and Englishmen)

Trolls were among the inhabitants of Albert. (PROSE: Grimm Reality)

Ryan Sinclair and Graham O'Brien decided to investigate rumours of a troll infestation in Finland shortly after they left the Doctor's TARDIS. (TV: Revolution of the Daleks)

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