The Doctor mentioned the Klade as being a potential threat to Gallifrey. (PROSE: The Infinity Doctors) Marnal claimed that the Klade had the power to destroy the Time Lords and Gallifrey, but admitted that they would not have had the nerve to do so. (PROSE: The Gallifrey Chronicles)
Behind the scenes
- Klade is both an anagram of "Dalek" (as "Dalek" is itself of "Kaled") and a play on the biological term "clade", which is a group of species sharing a common ancestor. According to the non-narrative source AHistory, the Klade were the humanoid descendants of the Daleks.
- In Lance Parkin's rejected pitch for a Eighth Doctor novel called Enemy of the Daleks, the Klade were confirmed to be the humanoid descendants of the Daleks and the ultimate destiny of all life in the universe. To repent for the sins of their ancestors, the Klade joined an alliance, led by the Doctor's father, to fight the Enemy and avoid Last Contact.