Stories Audio Book The Audio Novels The Mirror Matter 1 image Overview Characters How to Listen Quotes Overview Releasing sometime in July 2025 Written by Kate Orman Cover Art by Sean Longmore Publisher Big Finish Productions Narrated by Jon Culshaw Runtime 360 minutes Synopsis The Doctor, Liz and the Brigadier investigate the alien 'spores' - blobs of deadly mirror matter from the dawn of time. Liz summons fellow scientists to help the investigation. But one is secretly working for the BNKR, an organization preparing to take over the world. The BNKR unleash a killer spore. Meanwhile, the Doctor and Liz race to stop another spore, locked in a countdown to destruction. Can the Doctor and his friends prevent the entire Earth being converted into mirror matter? Skip Skipped Unowned Owned Owned Save to my list Saved Edit date completed Custom Date Release Date Archive (no date) Save Characters Third Doctor Liz Shaw The Brigadier Show All Characters (3) How to listen to The Mirror Matter: Digital Download The Mirror Matter Quotes Add Quote Submit a Quote