Percival's father was also a policeman. (AUDIO: The Year of the Bat) PC Quick served under Sergeant Kyle in the Metropolitan Police Service in London in 1889. He investigated the murder of Joseph Buller and reported his findings to the pathologist Professor George Litefoot. (TV: The Talons of Weng-Chiang) He was married. He told Leela that while he had faced some dangerous criminals in his time, "none of them hold a candle to [his] missus in a temper." (AUDIO: Jago in Love)