Judoon captain (The Pandorica Opens)

The Judoon Captain led the Judoon in The Alliance consisting of the Doctor's enemies, believing him to be the one who caused the cracks in the universe. The Judoon fleet travelled with the rest of the Alliance to Stonehenge, 102 A.D. He and his guards, along with other Alliance representatives, arrived at the Underhenge and locked the Doctor into the Pandorica (DW: The Pandorica Opens)

He was destroyed when the TARDIS exploded, the Doctor later managed to prevent this, resulting in the Alliance never having been formed in the first place. (DW: The Big Bang)