Defence of the Realm
- Sal: 1986
- Welat: United Kingdom
- Genre: Action, Thriller
- Studio: Enigma Productions, The Rank Organisation, National Film Finance Corporation (NFFC)
- Keyword: kgb, reporter, death, newspaper man, member of parliament
- Serek: David Drury
- Avdan: Gabriel Byrne, Greta Scacchi, Denholm Elliott, Ian Bannen, Fulton Mackay, Bill Paterson