Sebastian
- Godina: 1968
- Country: United Kingdom
- Žanr: Drama, Romance, Comedy
- Studio: Paramount Pictures, Paramount British Pictures
- Ključna riječ: london, england, spy, mathematician, british secret service, cryptologist
- Direktor: David Greene
- Uloge: Dirk Bogarde, Susannah York, Lilli Palmer, John Gielgud, Janet Munro, Ronald Fraser