The universe stands on the brink of a dimensional crisis, and the Doctor and Raine are pulled into the very epicentre.
Meanwhile on Earth, UNIT scientific advisor Dr Elizabeth Klein and another Doctor are tested by a series of bizarre alien invasions...
- Format: CD-Audio
- Publisher: Big Finish Productions Ltd
- Publication Date: 30/09/2012
- Category: Classic science fiction
- ISBN: 9781844359769