The Joker #3

The Clown Prince of Crime stakes his territorial claim in grand, unsettling fashion on this 1975 DC cover by Dick Giordano — a massive Joker billboard dominates the cityscape, his grinning face and pointing purple-gloved hand commanding all villains to keep out, signed with his own name for good measure. Bursting through the billboard in defiant answer is the Creeper, wild-haired and yellow-suited, whose speech bubble cheekily exempts himself from the warning. It's a wonderfully theatrical setup for "The Last Ha Ha," written by Denny O'Neil with interior art by Ernie Chua and José Luis García-López.