McGrath (The Curse of the Black Spot)

McGrath was a Pirate on the Fancy in the 17th century. McGrath was accidentally injured when fixing the rigging, giving him the black spot. The Siren then appeared, planning to take McGrath. McGrath tried to fight the Siren, but failed. He was then taken by the Siren to her ship, and later joined the rest of the crew when they took the ship for themselves. (DW: The Curse of the Black Spot)

Some time later, the Doctor recruited Avery to help him with an attack on the asteroid of Demon's Run to rescue Amy Pond. McGrath and the crew boarded the ship of Madame Kovarian during the attack and subdued its crew, preventing her escape. (DW: A Good Man Goes to War)