Mike and Molly plan their third anniversary party, which they do not intend to include Carl in.
Molly plans a party after hearing that Peggy is suddenly retiring.
Carl, Mike and Samuel take a road trip to Memphis to meet Carl's mother for the first 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
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.moreless
Molly reveals some juicy information about her past to Mike. Meanwhile, Carl and Samuel hold a St. Patrick's Day party hoping to meet women.
Mike starts construction on the basement in the Flynn house, but it turns out to be a more of a challenge than he thought. Meanwhile, Samuel becomes Carl's new roommate.
In hopes of easing their chance to make a baby, Molly talks Mike into giving up caffeine and eating healthier, causing withdrawal issues for both.
Peter tells his own version of the Nativity story as the family prepares for Christmas.
Molly couldn't be happier that she doesn't have to cook Thanksgiving dinner when Mike gets sick. But when Vince asks his brother to join them for dinner Molly pitches in. Being engaged for a year, Joyce decides to press Vince marriage. Carl takes Samuel with him to the Thanksgiving dinner at his church with the expectation of meeting some young women.moreless
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
Molly is frustrated when she realizes Mike has a weird face on each of their wedding photos. Carl is worried when Christina's ex-husband shows up.
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.
Molly and Mike are left without a wedding chapel when Molly's attitude doesn't sit well with the priest.
Molly throws Mike a surprise birthday party after learning he hadn't had one since he was a child. Meanwhile, Samuel tries online dating.
Carl is in a state of panic when Christina wants them to take their relationship to a new level.
Mike keeps cheating on his diet and tries to hide it from Molly as Thanksgiving approaches.
Carl attempts to get a date with an attractive woman he met at the diner.