Adolf Hitler was a historian from the 22nd century who went back to the Führer-Bunker in 1945 while doing a thesis on claustrophobia in bunker warfare[1].
Hitler recovered from wounds at Beelitz Sanatorium in Berlin[2].
Johnny Alpha, Wulf Sternhammer and The Gronk were sent by the Committee for Ultimate Retribution to apprehend Adolf Hitler to face justice in the 22nd century[3], travelling via a Time Slip. A look-a-like committed suicide in place of the Fuhrer[4].