James Fox
— Sir Anthony Blunt
Prunella Scales
— H.M.Q.
Geoffrey Palmer
— Donleavy
David Calder
— Chubb
Ann Beach
— Mrs. Chubb
John Cater
— Restorer (Robertson)
Edward de Souza
— Collins
Jason Flemyng
— Colin
Gregory Floy
— Radiologist
Barbara Hicks
— Lady at National Gallery
Anne Jameson
— Blunt's Secretary
Mark Payton
— Phillips
Julia St. John
— Receptionist
Richard Bebb
— Consultant