Recruited by the Russians during their days at Cambridge, three young Englishmen rise to become high-ranked MI5 agents until their exposure in 1949.
as Kim Philby
as Guy Burgess
as Donald Maclean
as Aileen Philby
as Melinda Maclean
as Sir Stewart Menzies
as Farquesson
as Philby's Control
as Herbert Morrison
as Graves
as Pattterson
as Reed
as Peterson
as Skardon
as Helenus Milmo
as Marcus Lipton
as Reporter
as Major Sansom
as Volkov
