Defence of the Realm
- Blwyddyn: 1986
- Gwlad: United Kingdom
- Genre: Action, Thriller
- Stiwdio: Enigma Productions, The Rank Organisation, National Film Finance Corporation (NFFC)
- Allweddair: kgb, reporter, death, newspaper man, member of parliament
- Cyfarwyddwr: David Drury
- Cast: Gabriel Byrne, Greta Scacchi, Denholm Elliott, Ian Bannen, Fulton Mackay, Bill Paterson