Johann Schmidt

Johann Schmidt was the eighth incarnation of the Doctor from an alternative timeline where the Nazis won World War II. In this timeline, the Seventh Doctor regenerated after he was shot in the back by Nazi soldiers in Colditz Castle in 1954. Escaping burial after regeneration, the Doctor adopted the alias "Johann Schmidt." He later tricked Elizabeth Klein into setting history on its true course. (BFA: Colditz, BFA: Klein's Story)