features a black dome and alternating light and dark skirt panels. A Supreme Controller or "Black Dalek" is also seen with a black dome, shoulders and skirt. Mark 3 Daleks First introduced in 1965, the basic design of the Mark 3 Dalek variant remained relatively unchanged throughout their later appearances. Mark 3 Daleks in the 1960s The Mark 3 Dalek variant first appeared in The Chase (1965), with Ray Cusick returning as designer for the serial. As the production required no location filming and Cusick felt that Daleks should be shorter than an average person, he had the enlarged fenders and wheels, installed for The Dalek Invasion of Earth, removed and replaced with the original style of running gear. Greater flexibility in the storylines was afforded by freeing the Daleks from reliance on static-charged metal floors for power and mobility. For this and further serials, however, the contrivance of dish aerials as energy receptors was dispensed with. They were replaced by a steel mesh wrapped around the upper collar of each prop, over which were mounted twenty-three vertical, oblong slats ostensibly forming a power collection array (although this function has never been confirmed on screen). A Black Dalek appears in the first episode of The Chase; "The Executioners". Daleks with non-standard arm appendages are also seen in this serial. A gimballed hemisphere referred to as both a "seismic detector" and a "TARDIS perceptor" appears, and in the episode "The Planet of Decision" an "electrode unit" is employed to disable an electronic lock. The prop consisted of a large revolving parabolic dish from the centre of which two converging rods protruded. In the later 1960s serials in which they appeared the Dalek design remained virtually unchanged, with only minor variations to the standard colour scheme and appendages. In The Daleks' Master Plan (1965) several Daleks are shown clearing areas of jungle using short, tubular flame throwers, referred to as "pyro-flame burners", in place of the standard plunger. A Dalek with a circular sieve-like scoop attachment in place of its plunger is seen in The Power of the Daleks (1966). It is used for transferring embryonic Dalek mutants from a liquid-filled nurturing tank to their travel machine casings. For this serial and future appearance of the Mark 3 variant, the gun design was simplified by removing the mantles. In The Evil of the Daleks (1967) a Black Dalek is seen again, this