Kadro (22)
John SaxonDr. Jack Costain
Patricia HainesAnn Barlow
Alfred BurkeDetective Supt. Hartley
Maurice DenhamDr. Morley
John CarsonThe Major
Ballard BerkeleyCmdr. Savage
Stanley MeadowsDet. Tom GrantBarbara StevensJoyce Malone (as Barbara French)Barbara FrenchJoyce Malone
Robert CrewdsonMedra
Aubrey MorrisThorburn
Jack WatsonThe Sergeant
Tony WagerPvt. HigginsDavid GregoryPvt. Jones
Marianne StoneMadge Lilburn
Warren MitchellReg Lilburn
Geoffrey LumsdenCol. DavyDouglas Livingstone2nd R / T soldier
Tom GillPolice Commissioner's secretaryVincent HardingFirst R/T SoldierRomo GarraraLieutenantJohn SherlockTV Newscaster