Monster Files: Isolus

The Isolus are an alien species, tiny spore-like creatures traveling through space, first appearing in the episode "Fear Her". In that episode, one of them was separated from the swarm and the creature wound up on Earth, inhabiting a young English girl named Chloe Webber. The Isolus was confused by Chloe's fears of her father and, acting through her, trapped neighborhood children in Chloe's crayon drawings. The Isolus released Chloe when the Doctor showed it the love the human race could produce in the events just before the 2012 Summer Olympics. An Isolus is a creature of intense emotion and it is sheer need to be together that keeps them alive.