Hecks on a Train is the twelfth episode of Season 6. It aired on February 4, 2015.
After learning that Aunt Edie has died, the Hecks board a train with the body to take her to her final resting place in South Dakota. But along the way, Frankie accuses Mike of not being very caring or nurturing after she trips in the dining car and is helped up by another man. Axl believes he caused Aunt Edie's death because he had used the excuse of her dying numerous times to get extensions on school assignments. Brick makes a questionable new friend on the journey. Sue worries she won't get accepted at any colleges due to accidentally sending out a draft of her personal essay, only for Axl to become furious when he discovers she applied to East Indiana State.