Judy Davis
Joan Fraser Welch

Sam Neill
David 'Dave' Hoyle, aka Agent 'Nine'

F. Murray Abraham
Josef 'Uncle Joe' Stalin

Richard Roxburgh
Joseph 'Joe' Welch

Rachel Griffiths
Constable Anna Welch

Geoffrey Rush
Zachary Welch

Russell Kiefel
Barry Rogers

John Gaden
Prof. C.W. 'Wilf' Wilke

Kenneth Radley
Bernard Shaw

Ben McIvor
Joe Welch at 8 Years

Fiona Press
Mavis Craig

Rowan Woods
Colin 'Col' Slansky

Alex Menglet
Yuri Nikolayev

Barry Langrishe
Ted

Ron Haddrick
Sir Allan Miles

Graham Ware Jr.
Harry

Heather Mitchell
Mrs. Savage

Robbie McGregor
Minister Frank

Paul Livingston
Beria

Dennis Watkins
Khrushchev

Stephen Abbott
Malenkov

Harold Hopkins
Police Commissioner

Roy Billing
Police Sergeant

Charles Little
Doctor