S8, E15: After Frankie tries to get a stubborn Mike to go see Dr. Goodwin (guest star JACK McBRAYER) to take care of his toothache, Mike convinces the good doctor to leave his tooth alone and tell Frankie that everything was ok. But the two find themselves fabricating a story that’s so ludicrous that they fear Frankie will figure out the truth. Meanwhile, since they are nearing the end of their senior year at college, Axl, Hutch and Kenny decide it’s time to sell the fabled Winnebago; Sue tries her best to let college golf cart driver Tyler (guest star KEATON SAVAGE) know that she likes him; and Brick attempts to write a historic Scottish rap musical – a la Hamilton – focusing on the life of Sergeant Charles Stuart MacKenzie.