Convinced that the Doctor is Varlos, the Agent demands the return of the Eternity Crystal. But what happened on Mordane to make the Crystal too dangerous to be left on the Moon? The Doctor has to convince the Agent that he is not Varlos and doesn't know what happened on Mordane, then escape with the TARDIS and find out. The Doctor decides that the Eternity Crystal must be destroyed but before he can the Agent and the Crystal vanish. He has to find the Agent, which leaves the Doctor only one option, and he doesn't like it...
- ISBN10 140590514X
- ISBN13 9781405905145
- Publish Date 29 January 2009
- Publish Status Out of Print
- Out of Print 11 June 2011
- Publish Country GB
- Publisher Penguin Random House Children's UK
- Imprint Penguin Character Books Ltd
- Format Paperback (B-Format (198x129 mm))
- Pages 128
- Language English