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.

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.