One Rule (audio story)

 was the fourth audio story in the first season of the Big Finish Torchwood series. It featured Yvonne Hartman for the first time in any medium since her television debut.

Publisher's summary
It's been three weeks since the Mayor of Cardiff was killed by a shop dummy and the fight is on to see who will replace him.

Yvonne Hartman is visiting the city to retrieve an invaluable alien device. She's in charge of Torchwood One, she's saving the British Empire and she doesn't care about local politics. But she is going to find herself caught up in that fight. There’s a bloodthirsty alien stalking the streets and there’s a special offer on at the all-you-can-eat Chinese buffet.

It’s the 26th of March 2005 and it’s the day that everything changes.

Plot
to be added

Cast

 * Yvonne Hartman - Tracy-Ann Oberman
 * Barry Jackson - Gareth Armstrong
 * Helen Evans - Rebecca Lacey
 * Ross Bevan - Dan Starkey
 * Meredith Bevan - Catrin Stewart
 * Gwen Cooper - Eve Myles (uncredited)
 * Andy Davidson - Tom Price (uncredited)

Continuity

 * The Mayor of Cardiff was killed by an Auton in London on 5 March 2005. (TV: Rose) He would eventually be succeeded by Blon Fel-Fotch Passameer-Day Slitheen, posing as Margaret Blaine. (TV: Boom Town)
 * Gwen Cooper and Andy Davidson are members of the Cardiff police force. (TV: Everything Changes)