Following a dramatic argument with Joyce over money, Mike and Molly move into Mike's childhood room at Peggy's.
Molly hates her draft of the novel she's working on and decides to take a break, but now she needs to decide on something else to occupy her time.
Molly meets her literary idol, J.C. Small, a cynic who advises her to write about things in her life that she wouldn't want people to know. Meanwhile, Mike invites his mother over for dinner in an effort to cheer her up.moreless
Molly decides writing a crime novel will be her new career, so she goes on a ride-along with Mike to research a book she wants to pen.
Molly makes a huge decision to stop her career as a teacher and delve into writing.
When Peggy breaks up with Patrick, Mike tries to reunite them; as a tornado reaches Chicago, Molly and Mike reveal important news to each other.
Mike's birthday wish is to have his wife and mother get along, but Molly and Peggy butt heads more than ever as they try to plan his birthday party together. Meanwhile, Samuel and Carl compete for the same woman.moreless
Following a disagreement with Mike at the mall, Molly goes on a shopping spree.
Mike decides to take things into his own hands and find out if he is fertile enough to make a baby with Molly. Meanwhile, Vince starts working as a door-to-door vacuum cleaner salesman.moreless
Mike is frustrated when Molly's Christmas spirit takes over and starts spending a lot of money. Meanwhile, Victoria new karaoke machine is the main attraction at the Flynn home, and Peggy forces Mike and Molly to spend Christmas Eve with her and the Captain at church.moreless
Mike decides to try for a detective position but, even with Molly's encouragement, getting ready for the exam stresses them both out.
When she realizes that her house is becoming too crowded, Molly decides to have a yard sale. Meanwhile, Mike and his friends take Carl for a fishing trip to help him get over his recent breakup.moreless
Mike finds himself in a tough spot when his mother begins dating his boss.
Mike and Molly have to deal with several problems as they make their way to the altar.
Two days before their wedding, Mike and Molly arrange their wedding rehearsal which turns into a disaster.
Mike's dad comes to town early to attend Mike's bachelor party, which prompts Peggy to attend Molly's bachelorette event.
Molly and Mike are left without a wedding chapel when Molly's attitude doesn't sit well with the priest.
When Peggy goes out of town, she leaves Jim with Mike and Molly in an effort to have them practice what having kids will be for them.
Molly throws Mike a surprise birthday party after learning he hadn't had one since he was a child. Meanwhile, Samuel tries online dating.
When Victoria ends up getting arrested for various traffic violations, Molly and Joyce turn to Mike for help.
After getting disappointing news at work, Molly goes into a bad state which threatens to ruin Christmas.
An exhausted Molly wants Mike to help her out with Thanksgiving preparations and wedding planning.
Mike keeps cheating on his diet and tries to hide it from Molly as Thanksgiving approaches.
Mike has no idea that encouraging his mother to get a job might cause drama for Molly.
Mike finally decides to leave his bachelor pad behind and move in with Molly and her family, but how will he cope living with a house full of women?