Rulebook (audio story)

 was the tenth story of the sixth season of Big Finish Productions' Short Trips series.

Publisher's summary
The Ellani of Beadledom 3 lived their lives in regulated harmony until they were invaded by the Valtor. Of course the Doctor and his new companion Peri were delighted to help out, but they didn't know their biggest challenge wouldn't be the Valtor army, but the Rulebook...

Plot
to be added

Characters

 * Fifth Doctor
 * Peri Brown

Worldbuilding

 * The Valtor are a cyborg species. The Doctor puts their invasion fleet into maintenance mode.
 * The transmat is used only for freight.
 * There are at least eight planets in the Beadledom system.
 * The Doctor's defeat of the Valtor, before the Ellani fleet arrives to assist, wastes 2.7 billion credits.

Continuity

 * Peri is the Doctor's new companion. (TV: Planet of Fire)