Public Enemy No. 1 is the ninth episode in Season Four of Danger Mouse
Just when he's infiltrated Baron Greenbacks secret hideout, Danger Mouse loses his memory after a crash on the head. GB takes advantage of the situation by making DM believe he is the second greatest criminal mastermind in the world, the White Shadow. In this new guise, DM immediately goes off on a relentless crime spree, stealing from the rich and giving to the poor.