I found this adventure incredible. I loved all the characterizations. Ace going off and developing relationships with numerous characters, which allows her to more fully understand and appreciate her bond with the Doctor. Usage of the historical London bombings during the Second World War only heightens the tensions. No one is ever completely safe for more than a moment. A page turner, and one where a great American character (a 40's private eye), a sinister, but grandfatherly eccentric, and the Nazi threat are all employed in a believable fashion. Bravo!