Today sees the release of Doctor Who - The Early Adventures: The Age of Endurance, starring William Russell and Carole Ann Ford as The Doctor, Ian and Susan and Jemma Powell (who played Jacqueline Hill in 2013's An Adventure in Space and Time) as Barbara:

The TARDIS materialises on board a still and eerie spaceship. When a squad of soldiers land, they realise they've found themselves in the middle of a war zone. With one of their crew trapped by the enemy, the Doctor and his friends find themselves locked in a desperate race for survival. Vast warships manoeuvre around each other as both sides try to out-think their opponents, flying into ever more dangerous areas of space.

The stakes could not be higher. But as ever in war, the lines between good and evil are hard to define. Will anyone survive to claim the moral high ground?

Doctor Who - The Early Adventures: The Age of Endurance is available now on Download and CD (which instantly unlocks a download version so that you can be listening even as our dispatch department puts your CD into the post!). If you're using any of the free Big Finish apps, you can even listen on the go!

This third series of four Doctor Who - The Early Adventures can be subscribed to for a saving - the first two series are both available as value-for-money bundles. The range continues next month with Doctor Who - The Early Adventures: The Fifth Traveller.

Check out our entire selection of First Doctor stories here.