Dalek Rabe

Some reports of the Battle of Canary Wharf suggested "Dalek Rabe" was a member of the Cult of Skaro, but Christian Peterson realised these reports were likely incorrect; (PROSE: The Secret Lives of Monsters) indeed, the four Daleks — Dalek Sec, Dalek Jast, Dalek Caan, Dalek Thay — were the only members of the Cult, with the other Daleks involved in the battle having been non-Cult drones locked inside the Genesis Ark. (TV: Doomsday)

Behind the scenes
Dalek Rabe was the original name for Dalek Jast during the production of Doomsday. Doctor Who Files and Doctor Who: Battles in Time incorrectly identified Jast with the Rabe name.