Ian Walker has: Played Det. Johnson in "Prisoner" in 1979. Played Pianist in "Repeater" in 1979. Played Detective 2 in "Prisoner" in 1979. Played Det. Insp. Bates in "Prisoner" in 1979. Played Police Inspector in "Prisoner" in 1979. Played Counter Officer in "Prisoner" in 1979. Played Det. Woods in "Prisoner" in 1979. Played Det. Insp. Barrett in "Prisoner" in 1979. Played Detective Sergeant 1 in "Prisoner" in 1979. Performed in "The Clinic" in 1982. Played Dinner party host in "A Thousand Skies" in 1985. Played R.S.M. in "Sword of Honour" in 1986.