Categorical Imperative (short story)

Categorical Imperative was the seventh short story in the Short Trips anthology Short Trips: Monsters. It was written by Simon Guerrier. It featured the First Doctor, Second Doctor, Third Doctor, Fourth Doctor, Fifth Doctor, Sixth Doctor, Seventh Doctor, Eighth Doctor, Sarah Jane Smith, Ace, Charley Pollard, Jamie McCrimmon, Jo Grant, Susan, Peri, Turlough and Tegan.

Summary
The Fourth Doctor and Sarah Jane go to a christening and are surprised to see the Third Doctor there too.

Characters

 * First Doctor
 * Second Doctor
 * Third Doctor
 * Fourth Doctor
 * Fifth Doctor
 * Sixth Doctor
 * Seventh Doctor
 * Eighth Doctor
 * Sarah Jane Smith
 * Ace
 * Charley Pollard
 * Jamie McCrimmon
 * Jo Grant
 * Susan Foreman
 * Peri

Continuity

 * Sarah Jane recalls encountering radiation poisoning on Skaro. (DW: Genesis of the Daleks)

Timeline
For the First Doctor:
 * Categorical Imperative occurs after ST: Indian Summer.
 * Categorical Imperative occurs before DWY: Urrozdinee.

For the Second Doctor:
 * Categorical Imperative occurs after to be added
 * Categorical Imperative occurs before to be added

For the Third Doctor:
 * Categorical Imperative occurs after PDA: The Wages of Sin.
 * Categorical Imperative occurs before DWAN: The House That Jack Built.

For the Fourth Doctor:
 * Categorical Imperative occurs after VD: The Duke of Dominoes.
 * Categorical Imperative occurs before ST: Observer Effect.

For the Fifth Doctor:
 * Categorical Imperative occurs after BFA: Excelis Dawns.
 * Categorical Imperative occurs before ST: Rome.

For the Sixth Doctor:
 * Categorical Imperative occurs after ST: Strange Attractor.
 * Categorical Imperative occurs before Crisis in Space.

For the Seventh Doctor:
 * Categorical Imperative occurs after ST: Closing the Account.
 * Categorical Imperative occurs before DWY: Metamorphosis.

For the Eighth Doctor:
 * Categorical Imperative occurs after ST: A Good Life.
 * Categorical Imperative occurs before ST: Venus.