Blake of Scotland Yard COMPLETE S 1-2

Jerry Sheehan, along with Sir James Blake and his niece Joan, have invented a 'death ray' that can be used to threaten aggressive nations with annihilation if they refuse to convert to the path of non-violence. Sir James trusts that his machine can end war and plans to make a gift of the technology to the League of Nations. But before world peace can be achieved, the claw-handed criminal mastermind known as 'The Scorpion' sends his gang of conspirators to steal the deadly device.