The Simpsons (1989): Season 30, Episode 21

30 - 21: D'oh Canada

On a family vacation to Niagara Falls, Lisa is mistakenly granted political asylum in Canada. When Marge goes to rescue Lisa, they are forced to re-evaluate their love for America as they navigate the polite Canadian landscape. Meanwhile, Homer takes Maggie to a "Daddy and Me" class. Blackboard: 'HAW Haw' (Bart flips it, Nelson duct taped to other side)