Living in the Past (short story)

Summary
The Doctor arrives in Mongolia during the Cretaceous period to pick up Ace, whom he had dropped off there. Along the way he encounters a pit of Dholes and an alien slave who has escaped from a nearby construction site. Ace arrives with a herd of various dinosaurs to trample the site, destroying it and freeing the slaves.

Characters

 * The Doctor
 * Ace

Continuity

 * Ace first expressed a wish to visit the Cretaceous in DW: The Happiness Patrol.
 * The Doctor mentioned Ace was visiting the Cretaceous in DWM: Train-Flight, which explained why he was travelling alone during his early DWM comic appearances.

Timeline
This was the first appearance of Ace in a Marvel UK publication. It is unclear precisely what story precedes this for her. The Seventh Doctor's entire runs in DWM and IHP precede this story. Somewhere between DW: Survival and DWM: A Cold Day in Hell (the Seventh Doctor's first comic strip adventure), he dropped off Ace to live with dinosaurs only to pick her up again in this short story. So the best we can say is that:
 * For the Seventh Doctor, this story occurs after DWM: Doctor Conkeror
 * For the Doctor and Ace, this story occurs before DWM: Teenage Kicks

Since Teenage Kicks is another short story, though, Ace's proper comic debut, however, isn't until DWM: Fellow Travellers. Nevertheless, these intervening prose stories do "count" in the Marvel UK continuity, because the Doctor mentions in Doctor Conkeror that he's about to "pick Ace up". Since both Conkeror and Living in the Past were in the same issue, the connection between the two is especially obvious.