"The Loudest Thanksgiving" (originally titled "Fowl Play") is the thirty-ninth episode of the third season, the one-hundred-fortieth episode, as well as the sixth full-length episode of The Loud House.
At Flip's Food & Fuel, Flip decides to tell the viewers the story of when the Loud family and Casagrande family met for the first time so they can spend Thanksgiving together.
On Thanksgiving day, Lori and Bobby are having a phone conversation, and proceed to show each other what their respective families do when Thanksgiving arrives:
After showing each other what they do for the Thanksgiving holiday, the two start to question if they should visit each other to spend the holiday, and Lincoln and Hector, who are eavesdropping on their conversations, tell their families of what they heard, and each begin to fear that if one of them were to leave to spend the holiday, they might never get to spend the holiday with them ever again. The two families decide to try and make Lori and Bobby believe that if they ever leave, life at their houses won't be the same.
At the Loud House, the family attempts to appease Lori in any way she can, such as giving her any piece of food, regardless if it's meant for dinner, have her rehearse her role in their yearly Thanksgiving act, and showing her her hand turkey. At the Casagrande Apartment, the family attempts to do the same to Bobby by giving him the food prepared for dinner, having him be in Frida's painting, and making him help in creating the paper chain decoration. After which, their families both try to guilt them into staying with them, with Lucy citing a sad poem, while Hector gossips Bobby with a story about a boy leaving his family for Thanksgiving. Eventually, Lori and Bobby become suspicious of their families' attitudes, and demand them why they're acting like this. The families admit that they don't want them to leave for the holidays out of fear that they'll never get to spend time with them ever again.
Sometime later, Lori and Bobby are having another conversation, and Bobby suggests that they should have their families get together, but when Lori asks who should host, the families, who are revealed to have been eavesdropping on their conversation, insist to each other that they host. When the two families can't decide, Lori decides to flip a coin (if Bobby guesses correctly, the Casagrandes will host, but if Bobby guesses wrong, then the Louds will host). Lori tosses the coin, and Bobby calls heads, but the coin lands on tails, much to the Louds' joy, and Casagrandes' dismay. Because of these results, the Louds strive to make their Thanksgiving the best there is, and the Casagrandes believe that if they can present their Thanksgiving traditions much more than the Louds, they can have future Thanksgivings at the bodega instead.
After the break, Flip, after briefly picking his teeth, gets back to work on telling the story.
As the Louds get to work to getting the Thanksgiving decorations up, the Casagrandes arrive. After a few friendly greetings, the two families begin to compete with each other, starting with Rosa hauling a truck load of food for dinner. The Loud family gets to work on starting their Thanksgiving act, which has the family act out a court case with Lori as the judge, the siblings as the jury, and Lily as a turkey that will be pardoned. Frida and Carlota, thinking they can do better, get to work on their Thanksgiving act, which involves the family dressing up as turkeys and clucking in tune to Hector's guitar. After the acts are done, the family decides to have dinner. As soon as Lori and Bobby sit down, the two families begin to bicker with each other, ranging from Lynn Sr. and Rosa to adding excess amounts of food to Lori and Bobby's plates, Rita and Hector making a toast at the same time, and the siblings to argue with each other. Eventually, the arguing gets so heated up, the families decide to have a food fight, but Rita stops the fight and discovers that Lori and Bobby are missing.
Flip concludes the story by saying that Lori and Bobby left their families and decided to celebrate at his store (which is where the episode is now). Lori and Bobby apologize when they realize that their families are not fit for each other, and at that moment, the Louds and Casagrandes arrive, and question why the two straight up abandoned them. Just as Lynn Sr. and Rosa get into another argument over what they should eat, Lori and Bobby, having had enough of their families' behavior, tell them that their constant bickering is what led them to leave them in the first place, and thinking that they two families can't get along, Lori and Bobby proclaim that they are going to spend Thanksgiving just by themselves from now on. The families, admitting that no one wants to be alone on Thanksgiving, decide to get along for Lori and Bobby's sake, and Flip suggests that the two alternate every Thanksgiving.
With everything settled, the Louds and Casagrandes end up having a successful Thanksgiving at Flip's, ending it off with a duet by Hector and Luna, which the families rejoice to, and bringing Flip to tears.
Carlitos has no lines in this episode. Although listed in the credits, Luan had no lines in this episode either, though she can be heard shouting with her family when they were competing with the Casagrandes.