In "Young & Christmas," Gabi and Sofia aren't able to be with their families this holiday season, so they decide to volunteer at a local homeless shelter on Christmas Eve. Yolanda is missing her kids and decides to boycott the holiday, at least until Gabi encourages her to reach out to her estranged sister, Jolanda. As soon as the siblings reunite at Josh's loft, however, old grievances are aired, and the family get-together quickly goes from bad to worse. But when Gabi discovers Jolanda is keeping a big secret from Yolanda, will the sisters finally make amends, or is more trouble on the horizon? Elsewhere, Josh goes out of his way to cheer up a miserable Elliot, who is missing Alan, while Sofia wrestles with her conscience when a department store clerk (Mindy Sterling) makes an error in her favor.

Gabi is excited when Jake buys her a food truck, then learns the problems that come with running such a business; a rabbi is reluctant to give Elliot and Alan his blessing; Sofia and Yolanda find romance at the wedding reception.

In "Young & Younger Brother Part 1," Elliot and Alan's wedding is right around the corner, and despite Elliot's misgivings, the couple asks Gabi to make some whimsical appetizers for their special day. When Josh's flaky younger brother, Jake, shows up for an unexpected visit and announces he wants to be a chef, Josh hires him to help Gabi with wedding prep. But as sparks fly between the two, Josh realizes what he's done and goes to great expense to separate the budding lovebirds. Elsewhere, Yolanda panics when she misplaces Elliot's wedding ring while one of the grooms feels left out of his own nuptials.

it's Gay Pride in San Francisco, and since they have a perfect view of the parade route, Gabi gets the brilliant idea to sublet their apartment for the weekend. Sofia can't take one more of Gabi's wild schemes and refuses to let strangers stay in their apartment. But when renters Sam and Gracie arrive, a fight ensues, and it turns out Gabi and Sofia have more in common with the strangers than each other. Josh is thrilled when he is invited to participate in an Ed Talk, but his stage fright causes his lecture to take an embarrassing turn. Meanwhile, Yolanda and Elliot's weekend of partying doesn't turn out quite like they expected.

Josh receives a special shirt from Gabi and Sofia as he prepares to launch his app, but then the gals want the shirt back because they discover it once belonged to Steve Jobs, which means they could get a lot of money for it.

Josh is about to release his first new app in a year, and he's freaking out about such an important moment in his career. Elliot and Yolanda have some creative presents for Josh, but a panicked Gabi didn't realize that such an occasion requires a gift. She and Sofia hit their local thrift shop and find the perfect thing - a black mock turtleneck just like Steve Jobs used to wear. But when it turns out that it's actually Steve Jobs' turtleneck and the family will pay big money to get it back, the girls go to great depths to steal it from Josh, which isn't easy since he thinks it's his lucky charm. Meanwhile, Yolanda tries to trick Josh into admitting that he doesn't like her gift.

In "Young & Earthquake," Sofia is depressed about her lack of job prospects, so Gabi takes her to a psychic to get a better idea of what the future holds. Sofia has serious doubts about Madame Paulette's abilities, while Gabi panics when she learns that Josh will pop the question and vows to avoid her boss's pending proposal. But when the fortune-teller accurately predicts an earthquake, it's clear she knows what she's talking about, so the girls go back for another reading. This time she promises them money, love and a bundle of joy, which looks like a possibility when Elliott and Alan ask Sofia a life-altering question. Meanwhile, Yolanda tries to help Josh conquer his fear of possible aftershocks with unfortunate results.

Sofia's younger brother arrives in San Francisco and asks Gabi out on a date; Josh and Yolanda scramble to plan a bachelor party for Elliot.

Gabi asks Josh to hire Sofia after Sofia quits her job, but when he doesn't, Gabi pretends he did and puts on a charade for Sofia. Meanwhile, Alan insists on meeting Elliot's mom, who misunderstands things and thinks that Josh and Elliot are engaged.

Gabi meets a handsome guy, but she's hesitant to date him because she's worried about Josh, so she arranges for Josh to date her neighbor. Elsewhere, Elliot recruits Yolanda to be a bingo host at Alan's bar, but he leaves out a very important detail.

Gabi returns from Switzerland and gets a new job with Josh's neighbor. Before long, Josh worries that his neighbor is attracted to Gabi, so he resorts to snooping on them.

Gabi gets a tempting offer to apply for a top internship in Switzerland, and she considers quitting her job to take the risk.

Cooper returns from China and reunites with Gabi, but his timing is bad for Josh, who was about to confess something to Gabi. Elsewhere, Alan has some surprises in store for Elliot.

Gabi finds a date for Sofia after she secretly sets up an online dating profile for her, but Sofia's new suitor is keeping a huge secret. Meanwhile, Josh takes a break from dating; and Yolanda realizes her new beau once had a close bond with Elliot.

Josh seeks a special gift for Shauna, so Gabi takes it upon herself to help him, but her actions lead to an uncomfortable reunion for Josh. Elsewhere, Elliot asks Yolanda to observe him sleeping and let him know if he does anything disturbing.

A bigger apartment opens up near Gabi and Sofia, and they want to move into it, so they try to win favor with their landlord by arranging a date between him and Yolanda. Elsewhere, Josh's new girlfriend is hiding something from him.

Gabi plans a night of romance with Cooper, but those plans are halted when Cooper uncovers something unexpected.

When Gabi hears its Elliot's 40th birthday, she's determined to make it special for him and his boyfriend Andre. But Gabi's plans end up causing problems between them, and her attempts to fix her mess only make it worse - alarming Josh, who needs Elliot to get him through an important interview. Meanwhile, Yolanda decides she wants to teach her ex-husband Coleman (guest star Cedric Yarbrough) a lesson, but ends up getting more than she bargained for.

Gabi and Sofia are discouraged that they haven't gotten as far in their careers as they would like, so they decide to take action. Gabi's plan involves reaching out to Logan Rawlings (guest star Ashley Tisdale) about writing a food article for her magazine. But Logan's idea of a topic involves Gabi cooking with a special ingredient. Meanwhile, Elliot is upset to learn that Yolanda makes more money than he does, so he decides to ask Josh for a raise.

Gabi wonders if her job is in jeopardy when she learns Josh has a new woman in his life that loves to cook for him. When Josh doesn't ask Gabi to be the chef for an important client dinner, Gabi decides a "cook-off" is the best way to keep her job. Meanwhile, Yolanda makes a date with the building window washer.

Gabi is freaking out about why Josh called the wedding off and searches for a sign if she should be with him or Cooper (recurring guest star Jesse McCartney), but it's Sofia who makes a surprising discovery. Meanwhile, Elliot has a big date with the wedding florist (guest star Miguel Pinzon) and ends up bringing a forlorn Josh along.