Mike and Molly are happy to be engaged but, where Molly's about planning the ceremony, Mike's all about the wedding night. This causes a rift that sends Mike and the guys off on a fishing trip.

Mike's mom, Peggy, is in for a big surprise when she celebrates her boyfriend Dennis's birthday.

When Mike moves in with Molly and her family, he has to adjust from life in his bachelor pad to a house full of women.

Molly wants to save money for their wedding, but Mike is lured into buying Vince's 1957 Chevy Bel Air.

Despite Mike's good intentions, he adds fuel to the fire when Molly and her family get in a fight.

Mike's spooked when Molly's boss invites them to a party on Halloween, a holiday he dreads.

Carl tries to get a date with an attractive woman he meets at the diner.

When Mike encourages his mom, Peggy, to get a job, he never imagines how it will interfere with Molly's life.

Mike cheats on his diet and gets caught.

When Molly is swamped with wedding planning, she asks Mike to help, with mixed results.

When Molly gets disappointing news at work, she is thrown into a funk that threatens to ruin Christmas.

Carl is confronted with his fear of commitment when he and Christina attempt to take their relationship to the next level.

When Victoria is arrested for various driving violations, Molly and Joyce ask Mike to help spring her from jail.

Joyce drives Vince crazy with jealousy when she agrees to have dinner with her ex-boyfriend.

When Mike fails to make Valentine's Day dinner reservations, he persuades Carl to share the reservations that Carl made for Christina. On their way to the restaurant, Mike and Carl must talk a suicidal man down off a ledge.

When Molly learns that Mike hasn't had a birthday party since he was 9 years old, she decides to throw him a surprise party. Meanwhile, Samuel dates a girl he met through an online dating service.

Mike is worried when Molly suggests that they write their own wedding vows, until Carl tells him to write vows like he's describing how much he loves lasagna.

When Peggy goes out of town, she leaves her beloved dog, Jim, with Mike and Molly, telling them it will be good practice for having children.

When Mike and Molly meet with the priest at Peggy's church, Molly's outspoken and forthright nature winds up costing them their wedding chapel.

With three weeks to go before the big day, Molly discovers that her wedding dress is too tight during her final fitting. Putting her dieting into overdrive, Molly's about to have a meltdown.

When Mike's dad comes to town early for his son's bachelor party, Peggy decides she should attend Molly's bachelorette bash - and proceeds to turn it into a raucous affair.

With only two days to go before the big day, Mike and Molly stage their wedding rehearsal - with disastrous results when it's upended by their family and friends.

Chaos ensues on Mike & Molly's wedding day as anything that can go wrong, does in the second season finale. Watch as they finally make their trip down the aisle and tie the knot.