Cytron

History:
They live in a different solar system,on planet Cytronius.They evolved from little robots into the Cytrons we know today.

The Doctor,in his 3rd Incarnation had exiled the Cytrons from the Earth,after many attack of theirs,in 2005 - Offscreen

Doctor Who Adventures:
After being exiled,The Cytrons continued attacking,by possesing electrical stuffs from Earth. - "The Cytrons"

They once managed breaking the exile.This was until the Doctor put it back. - "Time Blast"

They were also one of the species in The Battle from Gallifrey. - The Time Lords Return and [[Doctor Who Adventures/Battle at Galifrey|Battle at Gallifrey]

Twelfth Doctor Adventures:
In an alternate timeline,called "2005's Cytron World",no other year existed,other than 2005.In this timeline,the Cytrons were on Earth.They had their own version of Doctor and Helen,thoose being both Cytrons. - "Cytron City" and "The Battle in the City"