Spy, journalist, Australian army recruit and Hollywood movie star: who was this Mysterious Dutchie?

Bas de Groot does research into the Dutch Anzaccers and discovers the story of Mathew Bartholemew Antonino Marie Paanakker who could have been a spy for Germany during the first World War, moved around in high society, married an American heiress and starred in a silent movie.

Source: Bas de Groot