| "Let's Go Fly a Coot"
| Episode Information
"Let's Go Fly a Coot" is the twentieth episode of season 26 of The Simpsons and the five-hundred and seventy-second episode overall. It originally aired on May 3, 2015. The episode was written by Jeff Westbrook and directed by Chris Clements. It guest stars Carice van Houten as Annika Van Houten and Glenn Close as Mona Simpson.
- "The Simpsons learn about Grampa's days in the Air Force, and Bart takes up smoking to impress Milhouse's Dutch cousin, Annika."
The Simpsons are invited to Milhouse's birthday party, which is shown to be a big expensive party, so much that Kirk had to sell the house in order to pay it. When Marge and Homer think that all birthday parties are getting too expensive, Homer takes drastic measures: ruining other kids' birthday parties. However the party commitment discovers Homer's actions and at first put a black mark on the Simpsons, preventing Bart, Lisa, and Maggie from ever having another birthday party but Homer was given a deal to make sure the kids can have birthday parties again: Homer must give Rod Flanders a magical birthday party or the black mark will remain (That and Bart threaten to bang pots and pans on Saturday morning, preventing Homer from sleeping in late.). At Rod's party, Grandpa meets his old army friends, but Homer doesn't let him talk to them, as he is now old and useless. The army soldiers decide to teach Homer a lesson. They force them to make amends with Grandpa, so Homer takes Grandpa to the cinema, but Homer is disgruntled that Grandpa spent a lot of time in the bathroom. They eventually make amends after the soldiers force Homer to hug Abraham and admit his love at gunpoint.
Meanwhile, Bart meets Milhouse's Dutch cousin, Annika Van Houten, and starts to have a crush on her. When Annika tells Bart to get her some more E-cigarettes, Bart also gets a pair for himself to smoke. Yet, Marge catches Bart smoking an E-cigarette, but Bart tries to remind her it is legal in this state, Marge takes it up to Homer, who again says it legal. When Bart says that they are sending Annika home back to Holland, Grandpa tells him a story about when he was a planesman, he stole a plane and flew it up to space, and broke the sound barrier, while also destroying the plane, just to impress a girl called Sunny, who turns to be Mona Simpson. Grandpa says to Bart that he needs to make a grand gesture to Annika. Bart races to the airport and just narrowly manages to get to Annika. Bart then says that he never liked Annika, since all she did was complain about stuff. He then throws a bag of E-cigarettes at her, to which a large crowd of people take them all. Annika angrily curses in Dutch about her being rejected and leaves. When Milhouse says that Bart he can go out with more of his cousins, Bart says he will now steer clear of the Van Houtens for a while, but Milhouse says he won't, as he thinks marrying a cousin will improve links to his family.
As an epilogue, Homer makes Grandpa a steak, but when Grandpa complains about it, Homer turns it into a vapor for an E-cigarette. Grandpa tests it, and says it is the best steak he has ever breathed.