The Next Doctor quite like "The Next Doctor"." The book also contained two pictures from a scene cut from the end of the previous episode, intended to segue into the special echoing the previous two series. This scene was included on the series boxset. Following the success of last year's Christmas special, "Voyage of the Damned", which guest starred pop star Kylie Minogue as one-off companion Astrid Peth, Russell T Davies had initially felt tempted to copy this format with another high-profile guest star, but decided against it after jokingly offering up "Cheryl Cole on board the "Hindenburg"" as an example. Regarding an
Astrid Peth be the next companion after Martha Jones (played by Freema Agyeman) on 14 August 2007. Astrid's surname, Peth, was confirmed in the Christmas edition of "Radio Times". Davies has stated that the character was always going to be a "one-off" even before Minogue was cast and that Astrid would demonstrate "a whole new take – again – on what a companion can be". The name Astrid Peth generated some speculation before the episode's broadcast over the findings that "Astrid" is an anagram of "TARDIS", and that "Peth" means "thing" in Welsh. However, the episode established no such connection. On "Doctor