Once a respected naval officer, Avery turned to piracy after he was afflicted by an insatiable greed and he now commands a ragbag band of rogues. One of his crew claims to have seen Avery ‘gun down a thousand innocent men,’ but although this claim was never verified it’s clear that the Captain is quick with his guns.
Avery has a son named Toby who believes his father to be a man of honor, even after he deserted his family for three years. Avery’s love for his son eventually lead him to leave his planet to help ensure his survival. Although his current whereabouts are unknown, he was last seen on Demon's Run, fighting on the side of the Doctor.