Videoscope

Videoscopes were a technology the Daleks used on Skaro to monitor the situation around their city. They were created after the Monstrons' attack. (COMIC: Eve of War) They were also used to watch prisoners. (TV: The Daleks)

The Dalek Supreme, immobile in the city's subterranean levels, used videoscopes to monitor activity in the city above, possessing a special code to remotely activate them. (AUDIO: Return to Skaro) At the onset of the Thal-Dalek battle, the First Doctor and Susan Foreman destroyed one of the videoscopes when sabotaging a static electricity junction box. (TV: The Daleks)

Fifty cycles after the battle, the Supreme identified a returned Susan through the videoscopes, ordering all surveillance resources to be placed on her, causing the Daleks to be caught unaware by a later party of intruders. After identifying the Doctor and Ian Chesterton, the Supreme ordered all videoscopes to focus on the Doctor. (AUDIO: Return to Skaro)