Five Hundred Year Diary

The Five Hundred Year Diary was introduced in the 1968 Doctor Who serial The Wheel in Space, serving as a primary prop for the Second Doctor. Designed by the production team during a period of transition for the series, the diary was intended to emphasize the Doctor's immense age and his tendency to keep meticulous, if eccentric, records of his travels across time and space. It quickly became a signature element of his characterization, visually representing the weight of his centuries-long experiences.

Within the context of the series, the diary was often depicted as a worn, leather-bound volume that the Doctor consulted to recall specific encounters or verify historical data. It was brought to life through the understated performance of Patrick Troughton, who used the prop to ground the character's whimsical nature in a sense of scholarly tradition. The object has since been revisited in various forms of Doctor Who memorabilia, remaining a touchstone for fans who appreciate the show's early lore and the evolution of the Doctor's personal effects.