Mr Smith

Mr Smith was Sarah Jane Smith's computer. The computer was located in the attic of Sarah Jane's house at 13 Bannerman Road. Mr Smith was a super-computer, who had knowledge of every alien race in the galaxy of the 21st century (and possibly, the aliens of the past).

Aliens Featured

 * Krillitane
 * Bane
 * Butterfly Person
 * Uvodni
 * Raxacoricofallapatorian
 * The Beast
 * Abaddon
 * Macra

True Identity
Mr Smith revealed himself to be an Xylok, and was working against Sarah Jane and her allies. He teamed up with the remaining Slitheen, and helped to kidnap Luke Smith. (SJA: The Lost Boy)