The BEST episodes written by Carl Swenson

#1 - The Last Laugh

Batman: The Animated Series - Season 1 - Episode 15

The Joker covers Gotham City in a cloud of laughing gas and begins plundering the crazed city. But after Alfred is infected with the toxin, Batman has added incentive to stop the Joker and acquire an antidote from him before all of Gotham dies with a smile.