S5, E2: The first day of school is upon the Heck family – and Sue finds herself feeling a sense of freedom she's never felt before, with Axl not around to make her campus life miserable. But Brick, who is beginning middle school and afraid of getting a "swirlie," avoids the bathroom at all costs. Meanwhile, Frankie becomes jealous of Mike when she discovers that Axl calls and returns his texts but won't do the same for her; and Sue's feelings for Darrin (guest star John Gammon) surface once again when Mike calls him over to help fix the air conditioner.