Model Train Set (short story)

Summary
The Doctor sets up a model train set in the TARDIS slowly adding and building to it until it becomes a microcosm of its own.

Characters

 * Eighth Doctor

Continuity

 * The train set is later seen in Vampire Science and Genocide.

Timeline

 * This story occurs after ST: From Little Acorns
 * This story occurs before ST: The Glass Princess