Richard, Duke of Gloucester, a self-proclaimed villain, usurps the crown from King Edward IV, and is later killed at Bosworth Field. Henry, Earl of Richmond, ascends the throne as Henry VII, establishing the Tudor dynasty.

Night key: Karloff ignites the screen as the ingenious inventor of a security system who is kidnapped by a gang of burglars and forced to help them commit robberies (78 min.) Tower of London: Basil Rathbone and Boris Karloff star in his horrifying true tale of a ruthless king's rise to power with the help of his mad and murderous executioner (93 min.) The climax: Karloff is terrifying as a mad doctor whose insane jealousy over a beautiful opera...

The Yorkists have emerged victorious from the civil wars and Edward IV wears the English crown. But Edward's misshapen brother Richard harbours kingly ambitions and will stop at nothing to achieve the throne.