Dalek Empire III continued 2,500 years after Dalek Empire II: Dalek War, as the galaxy prepared for a new invasion by the Daleks. Dalek Empire IV: The Fearless took a different approach and detailed other areas of the first war with the Daleks, with different characters.
In December2006, Big Finish released Return of the Daleks, a special subscribers exclusive audio drama, which featured the Seventh Doctor with Susan Mendes and Kalendorf. It takes place between the events of The Human Factor and "Death to the Daleks!", the second and third releases in the first series of Dalek Empire. Also in December 2006, Big Finish released Short Trips: Dalek Empire, a short story anthology, featuring supplemental stories from various Dalek storylines, including the Doctor in several incarnations. Adapting Dalek Empire to the world of print, it also featured the full script to Return of the Daleks.