Anthony Blunt is an eminent Cambridge-educated art historian who is also working as a spy for the Soviet Union. In love with double agent Guy Burgess, he helps Burgess get yet another treasonous British agent to safety in Moscow. When Burgess unexpectedly defects as well, the government becomes suspicious of Blunt, but investigators have trouble believing such a refined and aristocratic gentleman would ever betray his nation and his class.
Ian Richardson
as Anthony Blunt
Anthony Hopkins
as Guy Burgess
Michael Williams
as Goronwy Rees
Rosie Kerslake
as Margie Rees
Geoffrey Chater
as Guy Liddell
Albert Welling
as Vasily
Michael McStay
as Donald Maclean