Tom O'Connor introduces the guessing game where five contestants attempt to baffle the panel with their extraordinary secrets. Among them Len Platt tells of his youthful mischief, Walter Turrell gets a big surprise from his encounter with the Royal Navy and special guest Stan Boardman tells of his impossible assignment. Attempting to crack the clues are Jan Leeming, Richard Stilgoe, Sandra Dickinson and debut panellist David Penhaligon MP.