Robbie's apparently firm happiness with Joy kindles envy in Matt, who is now so in love with wedding plans that he vows that his next steady date must be *the one*. Being commandeered into clinic duty, Matt misses his date with a promising candidate but he also meets a fellow med student, Sarah Glass, daughter of Rabbi Richard Glass. Sarah insists that they must meet each other's parents. Although both parental pairs plead against a mixed-religions marriage, the lovebirds soldier on.

Matt has married Rabbi Glass' daughter Sarah after one date. Robbie is mildly amused at the family's speculations and how they're worrying about whether Matt 'was dumber than Mary with Wilson'. Only Ruthie finds out, answering when Matt calls, but he swears her to secrecy. Meanwhile, Matt and Sarah go tell her parents first, but at the last moment she pretends they just got engaged, a lie they must now extend to the Camden home, where the 'news' only adds to the mounting stress.

Level-headed Robbie is the only one intentionally left home to babysit the twins when the Camdens accept a first dinner invitation at humorist Rabbi Glass's home. Mary beats Lucy to the punch faking illness so she can escape the event and try to seduce Robbie away from Joy. Simon takes his half-Jewish friend Morris along, but he fails miserably as a good example of someone from a mixed-faith household: he has no clue about the Sabbath or other Jewish traditions. Eric loses it completely when Matt says he's considering converting to Judaism, but they make up during a synagogue service.

Preparations for Matt and Sarah's wedding are being made and things aren't going the way Eric or Annie planned. Matt decides he will convert to Judaism after a discussion with Sarah's dad who convinces Matt that he can convert on the wedding day much to Eric's dismay. Annie panics when Sarah's mother tells her to expect 100 kosher guests to her backyard pot luck dinner. Ruthie and Simon begin to resent Robbie being in the house. Ruthie wants her bedroom back forcing Robbie out now that Matt will be moving out and Simon gets upset that Matt chooses Robbie to be his best man and Sam and David call for Robbie instead of him. Lucy gets upset that Kevin won't come to Glen Oak for Matt's wedding and Ben decides to propose to Mary after Mary starts giving him the cold shoulder. Eric and Sarah's dad the Rabbi go head to head and it seems Matt and Sarah's wedding won't go ahead after all.

The Camden family gather together for Matt and Sarah's wedding. Eric and the Rabbi make amends while Ben and Kevin decide to go to Glen Oak to pursue Mary and Lucy. Ruthie and Simon sort out their issues with Robbie.

Peter tells Ruthie she should talk to her parents about her problem. Simon asks someone else to the prom since Cecilia does not want to go. Annie talks to Sarah's mother.

Investigating a domestic-violence call, Kevin gets beaten up by the wife; nobody seems to care that Simon's about to leave for college; Ruthie and Peter work on a school project; Martin Brewer enters the Camdens' lives.

Matt and Ruthie get together to share a special anniversary date for something they share, but Matt does not want others to know he is in town. Martin takes Cecilia on a date. Vic wants to spend time with Paris because he wants to propose.