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