Character History
Mr Smith is a Xylok, a member of a crystalline race which crashed to Earth as a meteorite some 60 million years in Earth's past. It was trapped underneath the surface of the Earth until the eruption of Krakatoa brought a single, small Xylok to the attention of geologists. Sarah Jane received the crystal from a geologist friend as an aid to her studies in volcanic activity. She found that the crystal could communicate with her laptop; it revealed to her that it could help her track alien life and protect the earth. To this end it is the core of the supercomputer known as Mr Smith.
Read more about this topic: Mr Smith (The Sarah Jane Adventures)
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