The honeymoon is over, but the laughs continue in season six of Modern Family. As freshly hitched Cam and Mitch acclimate to the realities of wedded bliss, Phil and Claire find their marriage stressed by annoying neighbors, Thanksgiving dinner gone awry and Claire's online snooping. Meanwhile, a spy-camera drone wreaks havoc in Jay and Gloria's backyard and a close call on the highway leads to amusing changes in various members of the Pritchett-Dunphy clan.
Cameron isn't ready to conclude his honeymoon with Mitchell after their wedding. Gloria takes Jay to task over his appearance. The Dunphys must ready themselves for the return to school.
Phil, Luke, and Haley cause nothing but aggravation for Alex when they tag along on her tour of Caltech. Jay and Gloria have trouble finding the perfect gifts for their anniversary.
The Dunphys are down with a cold, thanks to Phil. Jay and Gloria try to help Manny deal with playing football, and Cameron doesn't know how much playtime to give him. Mitchell debates with Lily's new friend, Sydney.
Things become tense when the Dunphys temporarily move into a hotel, Gloria is suspicious of Manny's new girlfriend, and Mitchell discovers that he has jinxed Cameron's football team.
The Dunphys try to persuade the perfect couple to move in next door, Manny dates the daughter of Jay's biggest nemesis, and Mitchell and Cameron try to get Lily a new teacher.
Phil takes over Halloween decorating duties from Claire. Jay is upset when he wants to dress up as Prince Charming but Gloria buys him a Shrek costume. Mitchell has a problem in court with the stenographer working in a scary costume.
Haley and Andy start spending a lot of time together. Gloria wants Manny to learn Spanish at school instead of French, and a reporter takes more than a passing interest in Cameron and Mitchell's lives.
Phil and Luke take over Thanksgiving duties but Claire readies an emergency plan. Jay and Gloria get their holiday plans interrupted and regret not telling anyone. Cameron has to think of a way to get Lily to wear a dress for dinner.
Jay and Gloria try to get out of parties they must attend. Mitchell's kind gesture to a co-worker backfires on him, and Phil and Claire think Alex is lying when she tells them she found a boyfriend.
Claire and Gloria hang out with Haley on her 21st birthday. Alex, Luke and Manny babysit Lily and she decides to drop the ‘where do babies come from?’ bomb.
Jay's birthday comes with a number of interesting gifts, including Phil's high-tech outdoor grill, and Claire and Mitchell's offer to pay back some ancient loans—though they don't think he'll actually accept it. Meanwhile, Gloria teaches Manny and Luke a lesson about drinking; and Andy finds himself in an awkward situation when Haley brings her new doctor boyfriend.
Jay agrees to sub in on Cam's bowling team, not knowing it's an all-gay league. Phil and Clair have an unexpectedly nice time with their neighbors. Gloria and Mitch agree to go out with Haley.
Alex learns she has to share valedictorian honors with a rival, but the tie could be broken by a 1-mile run for a gym grade neither has completed. Meanwhile, Gloria studies for her U.S. citizenship test, but is distracted by a visit from Javier; and Mitchell and Cameron join a protest against a restaurant where they actually can't wait to dine.
Claire gets a job offer from a big hotel chain, but can't tell if Jay wants her to take it or keep working for him. Meanwhile, Phil, Haley and Luke are more interested in Alex's senior "ditch day" than she is; and Manny is dopey from pain killers after having his wisdom teeth pulled, so Gloria seizes the opportunity to get rid of his new girlfriend.
The sixth season ends with Alex's graduation party at Jay and Gloria's house, but Phil is stuck in Seattle on a business trip, so he uses the latest in technology to be as close as he can get. Meanwhile, Claire worries about Alex's gift, Jay complains that Gloria's cousin has overstayed his welcome, Mitchell keeps the news of his layoff a secret from Cameron, and a visit from Andy's girlfriend turns Haley's world upside down.