 The titular dalek was operated by three people. One actor was inside  the dalek casing to move and rotate the body. A second was moving  the head and eye stalk and operating the lights by a radio  controlled remote. The third was performing the voice and gesturing  to the remote control operator to time the lights with the voice. In  the original series, _"Doctor Who" (1963)_ (qv), the daleks had only  two operators; one performing the voice and the actor inside the  casing doing everything else.