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Dr Ludwig ��ü����󲹳ܲ����'s secret life is uncovered in a new BBC Two NI documentary Nazi sa Ghaeltacht.

In the documentary, a file at the Military Archives in Dublin, which the Irish intelligence agencies had compiled on ��ü����󲹳ܲ����, is uncovered.

In the end, with the Nazis defeated and ��ü����󲹳ܲ���� in a prisoner of war camp, he made one last desperate plea for help to Ireland.

Nazi professor Dr Ludwig ��ü����󲹳ܲ���� lived in the tiny Irish hamlet of Teelin in 1937, where he scoped out the potential secret U-Boat submarine base.

He also discovers that one of the first things ��ü����󲹳ܲ���� did when he found somewhere to stay in Teelin was to hang a large picture of Hitler on his bedroom wall.