Suggestions by @williambooth

Douglass Henshall

as Alec Leamas in The Circus

Anna Chancellor

as Anne Smiley in The Circus

Dominic West

as Jerry Westerby in The Circus

Sean Pertwee

as Mendel in The Circus

Tom Hardy

as Ricki Tarr in The Circus

Toby Jones

as Toby Esterhase in The Circus

Simon Russell Beale

as George Smiley in The Circus