It’s April 1945, in the heart of Nazi Germany, and only when the figure is almost upon us do we realise he’s wearing the stiff field tunic and peaked cap, emblazoned with an eagle badge, of a German SS officer. Then, suddenly, from behind the wreckage of a vehicle, something pounces – another man, quick and wiry, who knocks the officer from his mount, pins him to the ground, and sinks a knife into his eye socket. We see the attacker’s face. It’s Brad Pitt. This is our introduction to the good guy.