Filmed at the height of the Second World War, this serial originally featured a large amount of racist dialogue. A later reissue (released on video by Goodtimes) maintains the fact the villain is Japanese, but otherwise features new narration and dialogue which substitutes less-racist terminology.
Sony video release alters all dialogue referring to the villain being Japanese.
Shortened versions of the individual chapters were released for the 8mm home movie market in the late 1960s.
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