Past Reckoning (short story)

Past Reckoning was the fourth story in the anthology Decalog 3: Consequences. It was written by Jackie Marshall. It featured the Fifth Doctor and Nyssa.

Summary
The Fifth Doctor visits his old friend David Gosthorpe at his ancestral home, Trentyllis Castle, only to learn that David sold the castle to fund his archeological expeditions, and died penniless. His sister, Ellen Carter, plots to locate his greatest discovery and use it to reclaim the family fortune. But the Diadem of Helen has powers neither of them suspected.

Characters

 * Fifth Doctor
 * Nyssa
 * David Gosthorpe
 * Ellen Carter

Worldbuilding

 * Nyssa asks the Doctor hopefully about tea and cake.
 * The Doctor says he's from UNIT to avoid being questioned about a death.
 * David Gosthorpe died of a stroke in Naples, Italy in 1987.

Continuity

 * Nyssa suggests that she and the Doctor go and see Tegan now that they are on Earth. (TV: Time-Flight)
 * The Doctor identifies the Diadem of Helen as the Jewelled Headdress of Princess Maxtra, which the Tarronians persuaded him to cast into the Time Vortex. (PROSE: Tarnished Image)