Reconnaissance scout

Reconnaissance scouts were specialised Daleks sent out from Skaro to scout out new planets in preparation for invasion. Unlike other Daleks, Reconnaissance Scout Daleks possessed a number of abilities normal Dalek soldiers lacked. The Kaled mutant could possess other lifeforms like humans by sticking to the back and using its tentacles to form a mental link. If it was cut up and divided into pieces then the mutant could be restored to life by energy and teleport the pieces back.

One such Dalek arrived on 9th century Earth. It was defeated by an army of humans, and the mutant was divided into three pieces while its casing was destroyed but enough parts remained.

One part of the Dalek was exposed to ultraviolet light and the energy restored it. The mutant was able to possess Lin and forced her to rebuild its casing using what was left from the 9th century.

The Dalek was finally killed when the Thirteenth Doctor jettisoned it into a supernova. (TV: Resolution)