The Last Laugh Batman: The Animated Series : Season 1 Episode 15
TV-PG Fox Kids 23m int(0)
Aired: September 22nd, 1992 @ 10:00 AM EST on Fox Kids
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.