Supreme Dalek (City of the Daleks)
From Tardis Wiki, the free Doctor Who reference
A white Supreme Dalek led a squad of Daleks which arrived in the ruined city of Kaalann when the Eleventh Doctor and Amy Pond travelled back in time to Kaalann to stop the Daleks rebuilding their empire and invading Earth. The Doctor erased their alterations and the Supreme Dalek, along with the rest of its squad, was destroyed. (GAME: City of the Daleks)