In Berlin, SS-Gruppenführer Nebe was ordered by Heinrich Müller, Chief of the Gestapo, to select and kill fifty of the seventy-three recaptured prisoners in what became known as the "Stalag Luft III murders". Fifty were then executed, James being one of a handful sent instead to the Sachsenhausen concentration camp. On 23 September 1944, James escaped from Sachsenhausen, accompanied by Jack Churchill, Harry Day, Johnnie Dodge and Sydney Dowse using small cutlery knives to dig an escape tunnel over 110 metres long. On the run for several weeks, he was finally arrested in Pomerania before being transferred back to solitary confinement in Sachsenhausen. James's cell was tiny, just enough to stand up and stretch. For over 4 months Jimmy James suffered daily harassment from the guards, mock executions and, of course, virtually no food. As the Red Army was approaching, the SS decided to move the Prominenten prisoners further south, possibly to act as a bargaining chip with the Allies - though this has never been confirmed. Following a torturous journey via Dachau and Flossenbürg concentration camps, James and other Prominenten were moved to the South Tyrol where they were eventually liberated by partisans and US Army troops in May 1945.
