Somebody's interfering with time. The Doctor, Rose and Captain Jack arrive on modern-day Earth to find the culprit and discover a Neanderthal Man, twenty-eight thousand years after his race became extinct. Only a trip back to the primeval dawn of humanity can solve the mystery. Who are the mysterious humans from the distant future now living in that distant past? What hideous monsters are trying to escape from behind the Grey Door? Is Rose going to end up married to a caveman? Caught between three very different types of human being past, present and future the Doctor, Rose and Captain Jack must learn the truth behind the Osterberg experiment before the monstrous Hy-Bractors escape to change humanity's history forever. Featuring the Ninth Doctor, Rose and Captain Jack as played by Christopher Eccleston, Billie Piper and John Barrowman in the hit Doctor Who series from BBC Television.
- ISBN10 0563486392
- ISBN13 9780563486398
- Publish Date 8 September 2005
- Publish Status Out of Print
- Out of Print 19 December 2012
- Publish Country GB
- Publisher BBC Consumer Publishing
- Imprint BBC Books
- Format Hardcover
- Pages 256
- Language English