The Doctor regenerated after being shot in the back by Mestizer in the London docks. He spent several months lying low while Honoré Lechasseur conducted his investigations for him. (PROSE: The Cabinet of Light) Under the alias of Dr Smith, he tried to stop the Sodality from existing, so that hundreds of time sensitives would not be killed by them. After failing to gain the support of the High Executioner in erasing the Sodality from history, the Doctor departed in his TARDIS.