Davros "Revelation of the Daleks", and has the scientist trying to manipulate the galaxy's economy into a war footing similar to Skaro's. The Sixth Doctor manages to defeat his plans, and Davros is last heard when his ship explodes, an event obliquely mentioned in "Revelation". However the Doctor thinks he has survived. Davros also mentions he will work on a plan to combat famine, tying into Revelation of the Daleks. "The Davros Mission" is an original audio adventure (without the Doctor) available on the Complete Davros Collection DVD box set. It takes place directly after the television story "Revelation", while leaving
Earth: The Power of the Planet on the 15 September 2008. A 240-page hardcover book written by Iain Stewart and John Lynch () covering the topics seen in the episodes was released prior to the series being broadcast on the 18 October 2007. Earth: The Power of the Planet Earth: The Power of the Planet is a British documentary television series that premiered on BBC Two on 20 November 2007. The five-part series is presented by geologist Iain Stewart. In the United States, the series was broadcast in 2008 on the National Geographic Channel as Earth: The Biography. During filming in Madagascar, a new species of