When Dave's estranged father, Lamar, arrives in town eager to reconnect, his son finally learns the truth about his disappearance 30 years prior; Marty struggles to fire an underperforming employee.

Calvin pushes Marty to move up the opening of their new business to get a valuable celebrity endorsement from D.L. Hughley; Dave continues to struggle with the return of his father; Tina and Gemma prepare for the opening of their new school play.

Calvin is adjusting to getting older and the new stages of parenting, while Malcolm questions his career path. Lamar shows up to spend more time with Grover, which forces Gemma and Dave to loosen the reins a bit.

Courtney and Marty deal with some baby shower drama with Tina, while Lamar adjusts to a new job at the Fuse Box.