Batman Legends of the Dark Knight #142

Part 1 of the 4-part "The Demon Laughs." Batman's arch-nemesis, Ra's al Ghul, has concluded that he's missing the one ingredient necessary to fulfill his ambition of worldwide domination. And the man who holds that missing ingredient is none other than the Joker! For the first time, the Demon teams up with the Clown Prince of Crime to destroy the Dark Knight and take over the world!