The Invasion also featured the second appearance of Alistair Gordon Lethbridge-Stewart, now promoted to the rank which became his best known title - Brigadier. It additionally introduced the organisation known as UNIT, as well as the character of Corporal (later Sergeant) John Benton. Behind the scenes, it was the start of Terrance Dicks' record-setting tenure as script editor. Furthermore, it was the final major appearance of the Cybermen until Revenge of the Cybermen in 1975.