Calvin reluctantly agrees to dog-sit a glamorous little companion, only to face an awkward twist when someone else lays claim to it. Meanwhile, a joint celebration prompts Malcolm to question whether he and Mercedes are moving too fast.

When Dave and Gemma seriously consider a major life change, it sends ripples through the family and strains relationships. Meanwhile, wedding chaos and unexpected revelations complicate plans for Malcolm and Marty, forcing everyone to confront what's really ahead.