On Guard For Thee was a Canadian documentary television miniseries which aired on CBC Television in 1981.
This series concerns the history and status of Canadian national security following World War II, particularly the national security role which the Royal Canadian Mounted Police held until the formation of the Canadian Security Intelligence Service in 1984. Episodes included historic footage, dramatized reconstructions, excerpts from the 1948 motion picture The Iron Curtain and new interview footage. It was a co-production of the National Film Board of Canada and CBC.
This hour-long series was broadcast Sundays at 10:00 p.m. as follows: