Todd (Towards Zero)

Todd was the gardener on Agatha Fernbridge's estate. The Fifth Doctor recognised him. (AUDIO: Towards Zero)

The Doctor would eventually discover that Todd, along with many other people throughout history who looked like him, were caused by a group of Time War Daleks who — while on a mission to prevent the rise of Time Lord society on Gallifrey — created a time distortion which created alternate versions of themselves as four un-mutated Kaled people. This time distortion also caused there to be multiple copies of these four Kaleds at various points throughout time and space. (AUDIO: Effect and Cause)