UPVC (short story)

Summary
A double glazing salesman knocks on the TARDIS doors whilst it is in flight and offers the Doctor, Zoe and Jamie a double glazing window that has actual views of a particular place, as though the window were really at that location.

Several regenerations later, Ace is wandering the TARDIS corridors and comes upon a padlocked door in the TARDIS and attempts to get in, only to be found out by the Doctor.

Part I

 * Second Doctor
 * Jamie
 * Zoe

Part II

 * Seventh Doctor
 * Ace

Continuity

 * Jamie mentions Salamander who appeared in DW: The Enemy of the World.
 * The Doctor orders a window looking out at his home on Gallifrey, he returns to his home in NA: Lungbarrow.

Timeline
For the Second Doctor:
 * uPVC occurs after: Aliens and Predators
 * uPVC occurs before: The Colony of Lies

For the Seventh Doctor:
 * uPVC occurs after: In the Community
 * uPVC occurs before: Ante Bellum