Two thousand years ago, all civilisation on the planet Teymah was wiped out in an AELE - an Anomalous Extinction Level Event. Now, the galactic entrepreneur Lyam Yce hopes, at last, to learn the reason why the ancient Teymahrians went extinct - by funding a huge archaeological dig.

Vortex Ice / Cortex Fire is one of three main range 2017 Doctor Who titles consisting of two two-part stories, in a change from the usual four-parters.

Big Finish have been producing Doctor Who audios since 1999, starring Tom Baker, Peter Davison, Colin Baker, Sylvester McCoy, Paul McGann, David Tennant and John Hurt. Colin Baker reprises his role as the Sixth Doctor, or "ol' Sixie" as he refers to the character he's played for nearly 100 Big Finish productions!

Big Finish have been producing Doctor Who audios since 1999, starring Tom Baker, Peter Davidson, Colin Baker, Sylvester McCoy, Paul McGann, David Tennant and John Hurt.

The Doctor and Ace are locked up. The TARDIS is gone. Things just couldn't get worse, could they? Of course they could. Things can always get worse - the new President of the Solar System, Josiah W Dogbolter, didn't get where he is in life without learning that. That's why he has a Quantum Possibility Engine. It's a wonderful machine, creating a wonderful Solar System. And with this wonderful device, he can bring happiness and peace to all. Possibly. Either that or tear the universe to shreds, it's hard to be sure which. Cast: Big Finish have been producing Doctor Who audios since 1999,...