Before the Fall (audio anthology)

 was a special release in the Big Finish Torchwood series. It featured Yvonne Hartman and Ianto Jones.

Publisher's summary
London, 2005. Yvonne Hartman is the undisputed head of Torchwood One. Above the government, beyond the police, she has excellent people skills; enjoys regular tea with the Queen; and effortlessly defends the British Empire from alien threats.

Yvonne Hartman is excellent at her job, and inspires devotion in everyone who works with her - until, one day, she makes a terrible mistake. We all make mistakes. But only at Torchwood can a single mistake plunge your world into interstellar war.

Yvonne Hartman's facing the fight of her life. One she's going to win.

Stories

 * New Girl by Joseph Lidster
 * Through the Ruins by Jenny T Colgan
 * Uprising by Matt Fitton