The six-year on-again, off-again relationship between Robert and Amy is reaching a pivotal moment. Robert wants to propose to Amy, but there's one small formality the hopeful groom-to-be must take care of first: asking Amy's devout churchgoing parents for their daughter's hand in marriage.

Amy's parents show up unexpectedly at their daughter's apartment on a Sunday morning. They want to talk Amy out of marrying Robert and take her home to Pennsylvania. They are surprised to see Robert there and shocked to learn that he often spends the night.

Yet another bump appears on the rocky road to Robert and Amy's wedding, when the bride-to-be puts her betrothed in charge of writing the wedding invitations. Ray and Frank can't believe Robert let himself get roped into planning the wedding, they nevertheless come up with a plan to help ensure that Robert will never have to help out with the wedding again.

Ray throws a lame bachelor party for Robert and is shamed by Debra, Marie, and Amy into throwing him a proper one at the lodge, which will also be attended by Amy's father and brother.

Robert and Amy exchange vows in a classic Barone family wedding ceremony.

Robert and Amy exchange vows in a classic Barone family wedding ceremony.

After Amy invites her brother Peter to stay for dinner, he makes himself at home on the couch and never leaves.

Robert and Amy convince their families to spend Thanksgiving together. When the Barones arrive at the Pennsylvania home of Amy's parents, they find that their differing family traditions encourage lots of lively conversation.

Robert reveals that he has taken a second job selling home security systems, and that he has been asked to join the security firm full-time. But of course, this would mean retiring from the police force early.

Amy's parents put Robert on the defensive when they point out his compulsive habit of touching food to his chin before he eats it.

When the MacDougals are invited to spend Easter with the Barones, the two families attempt to bond over a 500-piece puzzle. While everyone else gets frustrated with the puzzle, Ray and Pat continue working on it until the wee hours of the night while sharing stories about themselves and their families.

Debra invites her divorced parents to the family Thanksgiving. When Ray walks in on the two having sex, he is traumatised and tells Debra about it. She assumes happily that her parents are getting back together.

Amy's parents ask Ray to give their son some advise on dating. Debra likes the idea of helping Peter finding a girlfriend and throws a cocktail party, inviting some single women to meet him, but Ray isn't thrilled with the guest list.

Robert discovers Pat smoking and she pleads for him not to tell anyone. When Amy later smells smoke on Robert, she tells everyone that he has been smoking. When Pat doesn't tell the truth, Robert ends up being yelled at. The next day, he tells Ray and Debra the truth, but it doesn't take long for the two to blurt out the secret in front of everyone, which leads to many more secrets being revealed.