The Ipcress File
Signey J. Furie
W. H. Canaway (screenplay), James Doran (screenplay), Len Deighton (novel)
Michael Caine as Harry Palmer, Gordon Jackson as Carswell, Nigel Green as Dalby, Sue Lloyd as Jean, Guy Doleman as Ross
Harry Palmer has to contend with his own side as he looks into the brainwashing of kidnapped British scientists.