In the autumn of 1941, a young Austrian doctor called Aribert Heim was assigned to the Mauthausen Concentration Camp. In just six weeks, he murdered hundreds of inmates by carrying out horrific and needless experiments. He evaded capture and has never answered for his crimes - but now 60 years on and with Heim well into his 90s, fresh evidence has emerged suggesting that he might still be alive.

The journey of two young filmmakers who gain access, for the very first time, to some of the most wanted Nazi war criminals still alive in an attempt to discover how their wartime actions have shaped their lives forever.

Take a look at the Nazis' secret breeding programme called Lebensborn, and how the surviving children have lived their lives in the knowledge that they were bred to rule the world.