The TARDIS lands on Phobos, moon of Mars - where extreme sports nuts of the future indulge their passion for gravity-boarding and wormhole-jumping.
But there's something lurking in the shadows, something infinitely old and infinitely dangerous...
- Format: CD-Audio
- Publisher: Big Finish Productions Ltd
- Publication Date: 30/05/2007
- Category: Science fiction
- ISBN: 9781844352593