Manny and Luke have their first day of high school, Cam works as a substitute social studies teacher, Claire begins her new job working for her dad, and Mitchell's boss hits on Haley.

Claire is excited to give Haley and Alex a great experience for "Bring Your Daughter to Work Day" but the staff is not making it easy, and Phil takes Luke and Manny's class out for community service day, which becomes a teachable moment in more ways than one. Elsewhere, Gloria is thrilled to be on jury duty leaving Jay to help out at Joe's pre-school and he is not happy about it at all. Cam and Mitch disagree over which of their friends to invite to their party, so could Gloria help mediate?

Mitchell helps Luke out with his "promprosal," sparking Cam's jealousy. Claire discovers that there is a mole for Jay in the company. Phil and Gloria confront a competitor who stole Gloria's sauce recipe.

Jay wants to make a good impression on a family moving in across the street; Manny tries to attract a radical thinker; the Pritchett family uses Alex's bout of mono to their advantage; Cam and Mitchell try to teach a message of acceptance.

Phil calls upon his alter ego to inject some sizzle back into his marriage; Jay shows favoritism in his parenting; Haley and Sal try to stand up to men in their lives.

Phil and Claire try to prove to their kids that Halloween is for adults. Mitch confronts Jay on the time it takes to renovate their kitchen. Cam oversteps as a house guest.

Phil and Claire go out of their comfort zone when he goes on a survival camping trip and she has to drive a big rig. Gloria is upset over Manny dating his female professor. A student in Cameron's detention class is an undercover cop.

When Claire lands a big opportunity for Pritchett's Closets, Jay expects a little validation for his contribution and takes over her celebration when he doesn't get one. Pam's charming but grifting ex-boyfriend Bo (James Van Der Beek) shows up to win his family back and Mitchell sees this as the perfect opportunity to get Pam out of the house. Meanwhile, Luke and Alex stumble upon a successful online business (online store for feet fetishists) that finally gets them on their feet. Finally, Phil has to make a sale to pay the bills but his new age client comes to believe that the house he's about to sell is haunted. Phil brings in Gloria to prove her wrong, but his plan backfires.

When Luke goes missing after a night out in a sketchy neighborhood, Manny, Phil and Gloria team up to track him down. Meanwhile, Haley is desperate to land an interview with the creator of a popular lifestyle website and interrupts Alex during one of her college classes. Alex's professor, Arvin Fennerman (Chris Geere), then proceeds to try and give Haley a piece of his mind.

In the Season 9 finale, Mitchell sneaks out to "Hero-Con" with fanboy Phil, dressed as their favorite characters from the show "Clash of Swords." It's great until Phil commits the ultimate fan faux pas. In a clash of another kind, Gloria's dinosaur party for Joe is ruined when her nemesis, Dr. Donna Duncan, upstages her with a far bigger and better party right next door.

Mitch and Cam help Lily overcome her insecurities about wearing a bathing suit to a pool party; with Gloria's new internship taking up so much of her time, Jay starts feeling particularly neglected.

Gloria uses her alone time with the twins as an opportunity to secretly baptize them before Haley and Dylan get home; Claire deals with the fallout from the smart closet fiasco; Cam feuds with his school's mascot.

Phil pays a visit to his dad after hearing some concerning news about him; Jay gives Claire and Mitch a bunch of their old childhood memorabilia that triggers them to reevaluate a long-held story about their first family vacation.

Mitchell learns a valuable lesson when a former resident of the house shows up unexpectedly; the Dunphy's old neighbor-turned-tech-titan, Kenneth, comes to visit with a big surprise for Phil; Manny's dad has a big opportunity for his son.