Extinction (audio anthology)

 was a full cast audio anthology released in 2015 by Big Finish Productions, and the first release of UNIT: The New Series

Publisher's summary
In this four-story box set, Kate Stewart, Osgood and the UNIT team confront an alien invasion by the Nestene Consciousness and its army of plastic Autons...

Stories

 * Vanguard by Matt Fitton
 * Earthfall by Andrew Smith
 * Bridgehead by Andrew Smith
 * Armageddon by Matt Fitton