Dennis Mitchell, now a mature adult, has transitioned from his mischievous youth to embrace the responsibilities of fatherhood as a single dad to his daughter, Millie. Despite his divorce from Minnie Minx, he remains determined to provide a nurturing and supportive environment for Millie. Surprisingly, he's fostered a positive relationship with his former rival, Walter, and has returned to their old school as a teacher. With his charming demeanor and a heart of gold, Dennis still retains goof. 