Sue's senior year, the Summer of Sue, begins with the premature removal of her braces. Meanwhile, Axl finally beats Mike in basketball and Brick tries to find the perfect backpack for school.

Mike and Frankie search for second jobs in order to send Sue to a good college, Sue and Brad produce a play for school, Brick finds some of his old lost toys, and Axl raids the house to furnish his new home.

Frankie and Mike are shocked when Brick announces that he wants to go to his school's fall dance. Axl has a week to declare his major but has no idea what it should be. Sue attempts to show she's more mature by drinking loads of coffee.

Frankie decides to buy a new kitchen table online, Sue and Darrin hit a rough patch over a piece of jewelry, and Axl and Hutch create a fratority to help pay for house bills.

Brick invites a girl over to the house for Halloween, Sue tries to raise money for college with a pumpkin patch screening of It's the Great Pumpkin, Charlie Brown, and Axl accidentally gets locked in the library.

The Heck house once again throws a curve ball to the family when the kitchen sink caves in and drops out of sight, causing Frankie to have to wash the dishes with the outside hose. Meanwhile, Sue is informed that - since Wrestlerettes does not qualify for P.E. credit - she needs to master tinikling (a difficult dance routine for a clumsy Sue) to get the credit she needs to graduate; and after Brick accidentally breaks Mike's lawn mower, he takes Axl's advice to try and play the hero card by taking his dad's wallet then returning it later, thinking this will divert Mike's attention away from the busted mower.

Thanksgiving for the Hecks at a local restaurant buffet doesn't go well when Sue feels that Mike doesn't like her boyfriend, Darrin, and Brick invites his quirky girlfriend, Cindy.

Mike accompanies Sue on a college tour weekend. Frankie leaves Brick with babysitters and a school project while she goes to watch Axl play in his first college football game.

Frankie has had enough of schlepping out the Christmas decorations and trying to make the perfect holiday for her family - who she feels doesn't appreciate all that she does for them - and decides to kick back on the couch and have a minimalist Christmas this year. Meanwhile, due to Sue's allergy to real Christmas trees, Mike attempts to purchase an artificial one and ends up not getting what he paid for; Axl puts Boss Co. back into business for the holidays as Tree Wise Men but gets into such a heated argument with Sean over a misfit toy that the two can't seem to work together; and Brick becomes fascinated by a Christmas letter the family has received and attempts to write one on his own outlining the past year of the Hecks.

Frankie gets excited when an old high school acquaintance who won a million dollars on Wheel of Fortune comes back to town. Meanwhile, Sue tries to find a unique skill to help get into college, and Axl tries to get date with Devin.

Frankie discovers an old, uncashed paycheck from Ehlert Motors. But in order for her to collect her pay, Mr. Ehlert forces her to work on the lot for one day. Meanwhile, after her hours at Spudsy's are cut down, Sue takes a part-time job from Mike as the quarry cleaning lady; Mike's dad, Big Mike, attempts to persuade a lazy Axl to help replace the Heck family's damaged kitchen sink; and Brick discovers the joy of watching '70s game shows and begins his own annoying classic contest with the family.

Aunt Edie has died and the Hecks take a train to South Dakota to take her body to its final resting place but during the trip, Axl feels guilty for causing her death earlier; Brick tries to follow Aunt Edies example of living life freely. Written by ants0916

Cindy wants a kiss from Brick, which makes him nervous. Darrin makes a scavenger hunt for Sue and seeks Frankie and Mike's help. Aunt Edie's dog Doris is trained by the Donahughes to be a normal dog which makes her want to live with them, and after Devin Levin told Axl not to get her anything, Axl tries to find a way to get her something.

Sue wants to back out of her engagement to Darrin, but she doesn't know how to do it. Meanwhile, Axl uses what he has learned in his psychology class to try and cure Brick.

Frankie is overwhelmed with guilt upon realising that she and the family forgot to celebrate Brick's 13th birthday; Sue wants to be included in the yearbook; Devin breaks up with Axl.

Frankie fears that her bad remark about Axl's hot friend may have been overheard. Sue takes Brick to a Planet Nowhere convention. Tag asks Mike for help on his driver's test.

Frankie nervously waits to see if Sue got into any of the colleges she applied to.

Frankie accompanies Brick on a school field trip and attempts to help her socially inept son make friends with a couple of boys. Meanwhile, when Devin scolds Axl for being mean to his sister, he tries to make it look like they are the best of friends when Sue spends the weekend at his house; and while trying to thin out some of their hoarding father's massive stockpile of junk, Mike gets a sinking feeling that he may have bullied his brother Rusty a bit too much as kids and turned him into the hapless man that he is today.

After Axl forgets to bring home a sombrero that Sue needs for a special high school senior photo she's setting up with Brad, she becomes super angry and won't let up on arguing with him. In an attempt to remedy the situation, Frankie takes Mike's advice to individually tell Sue and Axl the truth about how she thinks each of them is handling the situation, which causes even more friction amongst the bickering siblings. Meanwhile, Mike is shocked to learn that Brick has been awarded with the middle school's Athlete of the Month award.

A case of disrespect hits the Heck boys when Axl - who is celebrating his milestone 21st birthday - refuses to come home and help Mike move an old freezer, and Brick begins turning into a mini-Axl by dissing Frankie with a bad attitude. Meanwhile, Sue is torn over what to do when the manager of Chop Suey USA tries to woo her away from her job at Spudsy's.

Frankie and Mike find themselves caught in the middle of a long standing family feud when Frankie's Uncle Dutch contacts her dad, Tag in an attempt to reunite and bury the hatchet with his estranged brother. Meanwhile, a fearful Sue receives her first detention ever for being caught going off campus for lunch and seeks advice from Axl on how to survive the ordeal unscathed.

Frankie and Mike's date night is ruined when both fall asleep; Axl and Brick try to invent the next big thing; Sue is invited to the prom by a handsome store greeter but has to figure out a way to leave work early in order to go.

Mike's incompetence threatens to ruin Frankie's Mother's Day. Mike tells Axl, Sue, and Brick to put some effort into a gift for Frankie. Frankie asks the kids how they would differ from her as parents.

Sue prepares for her graduation and worries the day won't go perfectly. Meanwhile, Brick gets the opportunity to skip a year in school and Axl grows concerned about Devin's fun summer pictures she posted on social media.