The Dalek Saucer Commander was the designated commander of the Dalek Flying Saucer in Bedfordshire during the 22nd century Dalek invasion of Earth. Unlike standard Daleks the Saucer Commander had a black dome and black and silver slants and served as the second-in-command to the Supreme Dalek. The Commander, along with the Supreme Dalek and the Dalek fleet was destroyed at the climax of the story by the uprush from the exploding Penatrative Explosive Capsule (DW: The Dalek Invasion of Earth)
behind the scenes
the prop for this dalek is the same prop for the dalek superme,the production team didn't paint it in time for the show as seen during the attack on the saucer the commander went in but the supereme came out for it was not seen during the second part of part 2 and the rest on the episode