This episode shows how Europe's 19th Century intellectual culture supplied colonialists and imperialists with a moral - indeed 'scientific' - imperative to claim new territories, crush resistance and impose their rule. This is demonstrated by the colonialists treatment of the aboriginal people in Australia. Science offered racists the theoretical justification for Europeans to fulfill their 'manifest destiny' to impose their rule over all 'lesser breeds'. We see how the ideas that emerged from pseudo-science paved the way for the principle of 'racial hygiene' one of the ideas that would serve to justify several of the genocides of the 20th Century - including The Holocaust. List of experts interviewed: Prof David Dabydeen, Prof Catherine Hall, Prof Henry Reynolds, Prof Bain Attwood, Prof James Moore, Prof Steve Jones, Mike Davis, Dr Maria Misra, Dr Jan-Bart Gewald, Pastor Izak Fredricks, John McNab (Kaptein Rehoboth Basters), Casper W. Erichsen, Edwin Black, Dr Michael Burleigh.