Judoon captain

You could mean...

 * The Judoon captain who leaded a platoon on the Moon. (DW: Smith and Jones)
 * The Judoon captain on the Shadow Proclomation. (DW: The Stolen Earth)

Other Judoon captains

 * Tybo (SJA: Prisoner of the Judoon)
 * Rok Ma (NSA: Judgement of the Judoon)