Curiosity can be a snare and, because of his curiosity back in the nineteen-sixties whilst conducting an unusual experiment, Professor Charles Villiers and his colleague, Dick Martell, disappear. Some fifty years later, Harry Stanway decides to investigate. In Villiers' disused laboratory in Repository One at MoD Kineton, what Harry opens up threatens the destruction of the Prime Reality. Can Jem Darden and SHaFT find a way to avert impending doom? Read on, in 'A Question of Realities'.