George Smiley
Peter Guillam
Sir Oliver Lacon
Mendel
Toby Esterhase
Self – Host (uncredited)
Bill Haydon
Ricki Tarr
Percy Alleline
Roy Bland
Jim Prideaux
Fawn
Connie Sachs
Control
Roach
Spikely
Bryant
Lauder Strickland
Headmaster
Schoolmaster (uncredited)
Roddy Martindale
Barak
Czech Guard
Bookseller
