Mike and Molly gather with family and friends for a momentous occasion and reminisce about everything that led to this point.

Joyce conveniently disappears after a back injury renders Vince practically immobile, and that leaves Mike and Molly to take care of him. Meanwhile, the newlyweds are still laboring over personalized thank-you notes for their wedding presents.

Molly brings home a pregnant former student she discovers is homeless.

Peggy makes Molly do chores in exchange for sharing tantalizing stories from her past for Molly’s second book.

Mike blames Molly for Peg's heart attack following a heated argument and now Molly wants to make amends.

Mike and Carl go to couples counseling to try to reconcile their partnership. Also, Molly decides to do a promotional radio interview on her own after Peggy decides not to participate.

Mike is upset when Vince bails on finishing a Do-It-Yourself project they started together.

Mike and Molly need everyone to be on their best behavior when the adoption agency schedules a home visit.

Carl convinces Mike to go with him to see his psychic and Peggy drags Molly to her church to pray for something they’ve all been waiting for,

Two days before their wedding, Mike and Molly arrange their wedding rehearsal which turns into a disaster.

Mike is forced to set up his mom with his boss, despite his many reservations.

Molly gives Mike a device that will track his activity in hopes of helping him get healthier and take better care of himself, but Mike has other plans.

When Mike gets sick for Thanksgiving, Molly is excited that she doesn’t have to cook – until Vince invites his brother to town for a homemade Thanksgiving meal.

Molly is shocked when Joyce reveals she's leaving the house to Victoria in her will.

Molly's leisure activities between novels become an issue when Mike wants her to be the perfect homemaker.

When Mike and Molly realize Frannie (Juliette Goglia) doesn't have a plan in place for after the baby is born, Molly decides to help by reuniting her with her estranged sister, Maura (Jessy Hodges).

Even while portraying Santa, Mike cannot contain his frustrations over Molly's Christmas spending and warns unsuspecting children about the dangers of maxing out credit cards to buy toys. Later, while Molly's family enjoys holiday festivities at home - complete with Christmas carols on Victoria's new karaoke machine - Mike and Molly get roped into spending Christmas Eve at church with Mike's mother and boss.

Mike becomes hypervigilant after his wallet is stolen from the squad car while taking a nap.

Mike brings home a stray puppy for the weekend but Molly has difficulty warming up to it.

Mike turns Molly down when she invites him in after a date.

Mike's big plans for his first Valentine's Day with Molly are thrown into jeopardy after he accidentally runs into Molly's ex-boyfriend.

Peggy gets a big surprise when she celebrates her boyfriend's birthday.

Carl tries to get a date with an attractive woman (guest star Holly Robinson Peete) 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.

After getting disappointing news at work, Molly goes into a bad state which threatens to ruin Christmas.