约翰·福兰克林·罗宾斯

John Franklyn-Robbins

饰：Skardon

帕特里克·巴尔

Patrick Barr

饰：Mackenzie-King

迈克尔·巴林顿

Michael Barrington

饰：Gerald Gardiner

迈克尔·克雷格

Michael Craig

饰：Bruno Pontecorvo

Desmond Jordan

饰：Senior Scientist

Sandra Payne

饰：Marianne Pontecorvo

安德鲁·雷

Andrew Ray

饰：Klaus Fuchs

雷·史密斯

Ray Smith

饰：Doctor Cockcroft

Ernst Walder

饰：Russian Ambassador

彼得·杰弗里

Peter Jeffrey

饰：Major Phillips

格佛雷·肯

Geoffrey Keen

饰：Lord Chief Justice

詹姆斯·格林

James Greene

饰：British High Commission

Olaf Pooley

饰：Lord Halifax

Edward Wilson

饰：Alan Nunn May

Anthony Bekenn

Anthony Bekenn

饰：Canadian policeman

安东尼·卡里克

Antony Carrick

饰：Commander Burt,(as Anthony Carrick)

Ellis Dale

Ellis Dale

饰：Clement Attlee

Laurence Herder

饰：Sub-editor,(as Larry Hoodekoff)

Robert Sansom

Robert Sansom

饰：Lord Chief Justice Goddard

John Bryans

John Bryans

饰：Fuchs' contact

Boris Isarov

Boris Isarov

饰：Igor Gouzenko

Zhivila Roche

Zhivila Roche

饰：Anna Gouzenko

Tony Sibbald

Tony Sibbald

饰：Aide