Elenco & Equipe de X, o Inimigo Desconhecido
Dean JaggerDr. Adam Royston Leo McKernInspector McGill William LucasPeter Elliott Edward ChapmanJohn Elliott John HarveyMaj. Cartwright Michael RipperSgt. Harry Grimsdyke Anthony NewleyLCpl. 'Spider' Webb Ian MacNaughtonPvt. Haggis Peter HammondLt. Bannerman Michael BrookeWillie Harding Stella KimballWillie's Nurse Jameson ClarkJack Harding Neil HallettHarry, the amorous intern Marianne BraunsZena, the amorous nurse Max BrimmellHospital Superintendant Anthony SagarRear Gate Night Watchman Edwin RichfieldSoldier Burned on Back Frank TaylorConstable Williams John StirlingPolice Car Driver Jack LambertPolice Sergeant Archie DuncanSgt. Yeardye Jimmy SangsterArgumento / Gerente de Produção Michael CarrerasProdutor Executivo Edward MarshallArt Direction Gerald GibbsDirector Of Photography Philip LeakeyMakeup Artist Molly ArbuthnotWardrobe Supervisor Christopher SuttonDirector Assistente James BernardCompositor de Banda Sonora Original John HollingsworthMusic Director 
