The Rookies (1972)

Season 1: Episode 8

Assigned with the task of protecting a valuable witness, Danko and the Officers must exercise caution regarding visitors to the prison. When a professional killer disguises himself as a professor seeking to interview Sol (the witness), Danko denies him the opportunity. Nevertheless, Danko does agree to help the 'professor' by accompanying him to an aircraft hanger where he claims he is meeting a friend.