The spy genre came alive in the Silent Era, thanks to the paranoia triggered by invasion literature (fictional books that imagined attacks by foreign powers) and the onset of the Great War. Such fears led to the birth of early spy movies like The German Spy Peril, revolving around a conspiracy to blow up the Houses of Parliament, and O.H.M.S (standing for both “Our Helpless Millions Saved” and “On His Majesty’s Service”), which had the early prototype for what would later become the Bond Girl.