Doctor Who - The Eternal Battle by Mark Wright and Cav Scott is out today, the latest in our Doctor Who - The Fourth Doctor Adventures range, starring Tom Baker, Lalla Ward, John Leeson and Dan Starkey.

The TARDIS has landed in a war zone. The Doctor, Romana and K9 find themselves traipsing through an inhospitable battlefield. Strange lights flicker in the sky, and stranger creatures lurk in the darkness.

When rescued from an attack by a Sontaran tank, the time-travellers discover they’re facing a far more dangerous foe than the battle-hungry clones. This terrifying fight has been going on longer than anyone can remember… and shows no signs of stopping.

With the TARDIS missing and their luck running thin, the Doctor and his friends’ only hope of survival is to uncover the truth about what is happening on this planet. If they can discover the secret of the eternal battle they might just survive… but it might just mean the end of them all.

Doctor Who - The Fourth Doctor Adventures: The Eternal Battle is now available on Download and CD, for £8.99 and £10.99 respectively - with any CD purchase unlocking a digital version in your account as an exclusive to Big Finish listeners. Use the free Big Finish download/playback app for Android and Apple devices to listen on the go!

The first five series of Doctor Who - The Fourth Doctor Adventures are all available as collected, money-saving bundles. This entire latest series can be subscribed to for £65 on Download or £75 on CD, while next year's seventh series starring Tom Baker and Louise Jameson can be pre-ordered or subscribed to now.