The Johnsons and Butlers face big changes and unexpected challenges as Tina discovers a new passion; Malcolm navigates work and family boundaries; Courtney takes a major step with Marty; Dave's tech experiment backfires.

Calvin and Marty face permit delays at Westside Fuse Box, pushing back the grand opening; Malcolm's booming writing career sparks an urgent search for a new nanny; Dave is still struggling to bounce back after being fired.

Marty and Courtney face nanny drama as Calvin's hidden card game causes home tension. Dave's new hobby annoys others, while a text mix-up sparks conflict between Tina and Gemma.

Malcolm's home renovation takes an unexpected turn when Calvin's cousin Crutch shows up uninvited to fix his floors. Meanwhile, Dave's attempts to help lead to more stress than he bargained for.

Dave's silent auction wins lead to a classical concert outing with Gemma and the Butlers that quickly goes off the rails; Malcolm's ghostwriting gig takes a surprising turn.

Calvin receives an unexpected honor that sparks mixed emotions; Malcolm's ghostwriting gig takes a wild turn after a viral outburst from his celebrity client.

Dave's ambitious home improvement plans take a turn, prompting Calvin to step in; Malcolm seeks Gemma's help to overcome writer's block; Tina's suggestion for Daphne sparks a parenting dilemma for Courtney.

The Butlers' anniversary plans take an unexpected turn when a blast from the past resurfaces; Malcolm's meeting gets hijacked; Marty makes a big move toward commitment; Gemma finds herself caught in a holiday misunderstanding.

Calvin secretly coaches Dave during a big job interview; Marty plans his proposal; Malcolm's secret romance hits the tabloids.

Tina grows concerned about Malcolm's romantic choices; Calvin and Dave's street smarts are put to the test.

While Marty heads to San Diego for a tech convention and Courtney is away for the weekend, Tina's insistence on babysitting Daphne sparks a baby-proofing fiasco that leaves Calvin and Dave unexpectedly locked inside the bathroom.

Gemma throws Dave an unforgettable murder mystery birthday party; Malcolm uses the celebration to introduce Mercedes to his family.

Marty meets Courtney's intimidating father to ask for his blessing, but Clancy's cryptic response sends Calvin and Tina digging for answers. Meanwhile, Gemma and Dave are stunned by Grover's tattoo.