Huns within our gates (1918) is a silent World War I propaganda film, starring Derwent Hall Caine and Valda Valkyrien.
[1] Produced by the Arrow Film Corporation, the cast, characters and plot were used in The Crusher (1917).
After being re-edited the film was re-released as Commercial Pirates in March 1919.
[3] Arthur Morgan, son of an old Southern family is engaged in perfecting an aeroplane engine designed to revolutionize the air science.
The Prussian agents seek to trade upon his poverty to buy his invention, but he refuses to sell, and an effort to bomb the inventor and his plane is frustrated by the action of a pet dog, which carries the bomb away from the workshop and drops it, killing the spy, and disclosing the long buried treasure.