Mike is inspired by their honeymoon trip to Paris to change his life and travel the world, while Molly worries how their family and friends fared at home without them.

Joyce bails when Vince throws out his back, forcing Mike and Molly to take care of him. Meanwhile, the newlyweds also have trouble writing personalized thank-you notes for their wedding gifts.

Molly gets frustrated when she reviews her wedding photos and sees that Mike either has his mouth open or his eyes closed in every single one. Meanwhile, Carl gets jealous when Christina's ex-husband comes back into the picture.

Mike and Molly decide the time is right for them to start trying for a baby. Meanwhile, Carl gets upset when he learns that Molly is still spending time with Christina after their breakup.

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

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.

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.

When Mike gets nervous after Molly doesn't get pregnant following weeks of trying, he turns to Carl and Samuel for advice.

Molly encourages Mike to go after a detective position, but the stress of taking the qualification exam takes a big toll on their relationship.

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.

In an effort to boost their chances of getting pregnant, Molly encourages Mike to join her in giving up caffeine and eating healthier, causing them both to have major withdrawals.

Mike prepares to spoil Molly for her birthday, but his plans go awry after he eats psychedelic gelato made by Victoria's friend Tom.

Mike puts his construction skills to use turning the basement into a living suite for him and Molly, but he may have gotten in over his head. Meanwhile, Carl asks Samuel if he would be interested in moving in with him.

On Valentine's Day, Mike and Molly play Cupid and prod Harry into asking Victoria out on a date, and to everyone's surprise she accepts. Meanwhile, Carl has a list of reasons why hanging out at the coin laundry on the holiday will help Samuel and him meet single women.

Mike studies male fertility and visits a clinic to ensure that his swimmers are up to the task of starting a family with Molly. Meanwhile, Vince gets a new job selling vacuum cleaners door-to-door.

After their verbal brawl at the mall, Mike goes off in a huff, so Molly goes off on a shopping spree.

Carl and Samuel hope for a little luck o' the Irish when it comes to picking up women at their St. Patrick's Day party, while Molly does a little Erin go bragging when she tells Mike about some of her holiday shenanigans.

Molly joins her sister on a spring break road trip to party with Victoria's friends from junior college. Meanwhile, Mike pulls strings with his boss to get special overtime assignments in hopes of making extra money.

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.

After learning that Joyce gave up her artistic talents when she became a mother, Molly decides that she and Mike need to pursue new hobbies before becoming parents, so they take up roller skating.

Mike goes on a junk food binge to cope with missing Molly while she is out of town for a teacher's conference. Meanwhile, Carl contemplates leaving Chicago after learning heartbreaking news from James.

Molly is so focused on directing a school recital that she doesn't realize a fellow teacher is hitting on her. Meanwhile, Vince convinces Mike to join him in an unusual money-making scheme.

Mike and Carl get stuck working at the Renaissance Faire after their boss, Patrick, gets dumped by Mike's mother. Later, as a tornado descends on Chicago, Mike and Molly each confess important news to each other.