In the fifth season premiere, Molly (MELISSA McCARTHY) returns home after eight weeks at a writers' workshop with great news: she's getting published and scored a big book advance.
Mike assures Molly he'll be home in time for Christmas Eve dinner...until he and Carl end up in the back of a stolen truck. Meanwhile, Molly is upset with Vince for trying to change the family's Christmas traditions.
Molly urges Mike to go to the doctor when she learns that he hasn't been in over a decade. The 100th episode was directed by series star Melissa McCarthy.
Molly is nervous about Mike attending a celebratory party her publisher is throwing for her and Peggy. And Mike's feelings are hurt when she doesn't want him to go.