G-Men vs. The Black Dragon (1943) is a Republic Pictures movie serial. It is noteworthy among adventure serials as containing an unusually high number of fistfights, all staged by director William Witney and a team of stuntmen.

Plot

After Japanese spies from the Black Dragon Society infiltrate United States borders, Federal Agent Rex Bennett is enlisted by the government to capture them. As Oyama Haruchi, leader of the dangerous paramilitary group, begins to destabilize the United States war effort through sabotage and corruption, Bennett must team up with British special agent Vivian Marsh and Chinese special agent Chang Sing to stop them and help win the war.