The Doctor, Susan, Ian and Barbara land on Hydra, where Admiral Jonas Kaan leads a flotilla of ships trying to elude the vicious race that has invaded their world. But his ships are being picked off one by one, dragged underwater by an unseen foe...
| ISBN: | 9781781783368 |
| Publication date: | 30th September 2014 |
| Author: | Nicholas Briggs |
| Publisher: | Big Finish Productions Ltd |
| Format: | CD-Audio |
| Pagination: | 120 pages |
| Series: | Doctor Who |
| Genres: |
Science Fiction |