Comedian Jack Whitehall hosts this game show where celebrity contestants relive the highs and humiliations of school life - from pop quizzes and report cards to recess and parent teacher conferences - all while trying to stay out of last place.

The celebrities need to channel their inner school spirit as they head back to summer school, facing a mix of brain-teasing tasks, fast-paced physical challenges, and long-buried classroom knowledge. Each week, the 'smartest' celebrity graduates, narrowing the field until a high-stakes final exam determines who will be left standing with the distinction no one wants - the title of The Nation's Dumbest.