D'oh Canada/References

Cultural references

 * The title of the episode is a wordplay on Canada's national anthem "".
 * The couch gag parodies the sets of various sitcoms: ', ', ' and '. It's also a repeat of "How the Test Was Won"'s.
 * The Simpsons pass by:
 * a Toys R Us store, with the mascot Geoffrey the Giraffe attempting to hang himself but failing because his neck is too long for him to "hang."
 * a bankrupt Sears and Roebuck.
 * Circuit City overrun by wild dogs.
 * Homer holds a pendant for the Buffalo Bills.
 * The Simpsons drive by a Kodak plant that is demolished.
 * In Homer's song, a parody of "" from the musical , he mentions that Benedict Arnold fought in Upstate New York.
 * Second Best Western is a reference to hotels.
 * Lisa's foster family mention the following Canadian restaurant chains:, , , and Humpty's.
 * The Alanis Morissette Elementary School is named after Canadian singer-songwriter.
 * Students at the school can with prime minister Justin Trudeau.
 * Lisa asked Justin Trudeau about the, which allegations started almost three months before broadcast of this episode.
 * When Lisa's teacher says that they're doing a play based on a Canadian novel, Oliver asks if it's  by.
 * The play is actually  by Margaret Atwood.
 * Lisa asks if she can try out for the role of Offred.
 * Marge crosses the Detroit River on Ambassador Bridge.
 * The sign outside Lisa's foster home says "Give us your s and Lena Dunhams."
 * The Newfie sings "Islander Forever", written by Arthur O'Brien of The Navigators.
 * The American Consulate says "Coming Soon - ."
 * Marge said that the last vote Homer cast was for Quisp. Homer then held up a box of the cereal, a reference to politician:
 * The drink Molson's Jr. is a reference to Canadian politician
 * When Lisa imagines famous Americans, "" by plays.
 * Lisa imagines Abraham Lincoln, Dumbo, Aretha Franklin, Eleanor Roosevelt, Seabiscuit, (the computer that won Jeopardy!),  and Louis Armstrong.
 * The Canadians getting Marge and Lisa across the river said that for every Martin Short there's no shortage of William Shatners.
 * When Lisa returns to Springfield, "" by plays.
 * Lisa's Canadian class watches an episode of .
 * During the end credits, "" by plays.

Trivia

 * Mr. Largo mentions that the Springfield Elementary School Band have been working on the same song for 30 years, a reference to the opening sequence.
 * The vehicles on Ambassador Bridge all have license plates of production codes:
 * DABF11 - "Weekend at Burnsie's".
 * PABF1? - a season 23 episode.
 * JABF02 - "The Haw-Hawed Couple".
 * YABF14 - "D'oh Canada".
 * Ned Flanders's passport number starts off with "YABF14", the production code for the episode.

Continuity

 * The Simpsons go to Mt. Splashmore. ("Brush with Greatness")
 * The newfie destroys a Robopet. ("Replaceable You")
 * Lisa said she missed Princess, the pony she only had for a week. ("Lisa's Pony")
 * A portrait of Gordie Howe is seen in the classroom, in Alanis Morissette Elementary School ("Bart the Lover")