As the summer winds down, Amber and Reggie reveal to their families that they've been dating. Jackie calls for a family conference - in a newly revealed basement at the Bird-Kersee home - at which both families vote on whether or not the couple can stay together. Things approach fever pitch until Abby interrupts with a heartfelt speech about how Reggie is the only person to ever make Amber smile. Then, just as the families are about to embrace the relationship, an unexpected guest arrives to compete for Reggie's affections.
After learning about April Fools' Day, Larry plans to prank the Weavers; Jackie helps Reggie try to convince Amber that he isn't interested in his Zabvronian soulmate.
Jackie takes a menial job at a fast food restaurant to support her family but is embarrassed to tell her best friend Debbie. When an opportunity arises to impress her new boss, Jackie invites her home for dinner but the trouble is, the woman thinks she is a fellow Brit.
After a botched game night leaves Jackie doubting her and Debbie's friendship, they go for makeovers by Shirley (guest star Wendy Williams) at a salon that specializes in African American hair care - hairstyles ensue. Also in the episode, Amber and Reggie continue to explore their biological differences and bond over nature programming, while Dick's plan to get Marty in shape backfires and results in an injury that brings Larry face-to-face with the realities of Earth's healthcare system.
When Larry hears the story of Chanukah, he becomes instantly enamored with the holiday and announces that he wants to combine his two favorite holidays - Halloween and Chanukah - to create "Challoweenukah". When no one shows up for the first seven nights of the new holiday, Larry decides to publicize it by giving out candy to kids at the local playground, getting him in trouble with the police. Meanwhile, Marty and Debbie's arch-nemesis couple challenges them to a family Halloween costume contest.
As football season consumes the rest of the Weaver household, Debbie focuses on Amber's relationship with Reggie. With the help of Jackie, the mothers set up a secret romantic date for their eldest children. Meanwhile, Larry decides golf is a boring and pointless game and endeavors to replace the sport for the community with football, wardrobe and all.
Debbie creates and designs a unique purse and Jackie gets them booked onto "Shark Tank" to find an investor. When Larry joins them on the show, the outcome from their presentation is not what anyone of them - including the Sharks - expected. Meanwhile, Amber (literally) steps up to be Abby's choreographer for her big dance recital.
Following her experience in the Shark Tank, Debbie decides to attend a Business School, but before she can apply she must pass a qualifying exam. Thus, Marty steps up to help more around the house, while Dick becomes her tutor. Meanwhile, Amber and Reggie's relationship is put to the test after a new and improved Jane enrolls at their school.
Marty and Debbie are hoping for an uneventful Thanksgiving, but their hopes are dashed when Marty's father arrives with a suitcase and informs the family that, after fifty years of marriage, he and Marty's mother are getting divorced... ..and, oh yeah, he's moving in. Jackie's parents arrive from Zabvron just in time to witness the fallout and learn about the peculiarities of human relationships.
When a water pipe bursts in the Weaver house, Mother Joyner and Father Kersee help the Weavers clean up the mess. Marty and Debbie are so eager to finally have the company of warm, supportive parents that they don't realize they're inadvertently causing a rift between Jackie and her parents. Will they ever be able to make up? Meanwhile, Larry steps up his job hunting to prove to Jackie's parents that he can get a job and support his family.
When Debbie oversteps and accidentally ruins Larry's surprise Christmas gift for Dick, Larry responds the only way he knows how: going way over the top for gifts to Debbie's kids. Meanwhile, thinking gifts are the emblem of how you truly feel about someone, Reggie and Amber both struggle with getting each other the perfect gift.
After the Bird-Kersee's are mugged, they become panicked about safety while living on Earth, so Debbie and Marty attempt to teach them how to protect themselves, and Larry decides to build a Panic Room... in Marty and Debbie's bedroom. Meanwhile, when Jane intrudes on a date night for Amber and Reggie, he must decide, once and for all, which girl he wants to be with.
Marty and Debbie are excited about their upcoming 25th high school reunion. Debbie has had quite a year since moving to Hidden Hills from Bayonne, but knows she will soon face her arch nemesis, the wealthy and beautiful Tina Giannulli. Likewise, Marty is excited his high school hair band, Motor Baut, has been asked to perform at the event, but his moment of glory is soon turned upside down in more than one way.
Debbie struggles with going back to school and the advances of a flirtatious professor, while Marty is at home with Amber, mourning her relationship with Reggie. Meanwhile, Larry & Reggie are emotional wrecks as their Zabvronian male cycles have synchronized, and Dick is going through the "terrible tens".
When she hosts her college study group at home, Debbie's maternal instincts kick in and she can't help herself from being more of a mom than a peer with the other students. Later, Larry experiences jealousy for the very first time after visiting Jackie at work while Amber and Reggie make an important decision about their relationship.
Debbie finally joins a popular social media outlet and starts friending her old friends from Bayonne. Because she and Marty have lost touch, the Weavers decide to throw an Oscar party and invite everyone to reconnect. When the Bird-Kersees hear about the festivities, they decide to make themselves indispensable to the Weavers by turning the house into the most lavish, over-the-top Oscar party.
Marty and Debbie are worried when Larry Bird tells them his Indian co-worker at the coffee shop has invited him to a traditional Indian wedding. Despite their pleas, Larry decides to attend without their approval and he and Jackie get carried away when trying to come up with a wedding gift. After Larry does research on Indian weddings, he concludes all weddings take place in "Bollywood" and decides to give his friend a full scale Bollywood number.
Marty and Debbie are feeling like they are in a rut, so Marty plans a date night, but it turns out not exactly as Debbie envisioned it. Meanwhile, Dick falls madly in love with the new babysitter.
Debbie's estranged wild child mother (guest star Rhea Perlman) invites the Weavers to come to her timeshare in San Diego and meet her newly adopted son - he's 10. Debbie agrees to the trip provided that Larry & Jackie come too as a buffer. Meanwhile, Marty tries to cure Abby of her fear of the ocean.
Marty and Debbie love their new Friday night bowling league but Debbie is terrible and the other two teammates ask Marty to kick her off the team. Meanwhile, when word gets out that the alien colony is getting a little too Americanized, Larry's father sends an ominous figure to possibly take over the mission.
Larry's good-looking brother, DJ Jazzy Jeff, arrives in the community and tells everyone he is just there to visit his family, but in reality, he is secretly working with his father to bring everyone home to Zabvron. Will he succeed with their plan? Meanwhile, Amber has a new college boyfriend and finally confides in Debbie. Will she be able to keep Amber's confidence?.
Larry learns that he is pregnant and makes a decision about returning home or staying with the rest of the Zabvronians. Meanwhile, Reggie must also decide if he wants to stay himself or turn human, and the families see two new visitors arriving at the neighborhood.