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