In a story that could have been lifted straight from a spy novel, a German scholar who claimed to be learning Irish was scoping out a possible back-door route for a Nazi invasion of Britain.
Ludwig Mühlhausen lived in the tiny Irish hamlet of Teelin, in Co Donegal, in 1937, where he identified a potential secret U-boat base. When he returned to Germany he broadcast Nazi propaganda in Irish from Berlin into Ireland during the Second World War before becoming a decorated SS officer.
Mühlhausen’s secret life is uncovered in a new BBC Two Northern Ireland documentary, Nazi sa Ghaeltacht.
Kevin Magee, a journalist, traces the professor’s footsteps back to Berlin and reveals that he was fast-tracked through the ranks of the Nazi regime