High Treason

Jameson Thomas

Michael Deane

Benita Hume

Evelyn Seymour

Humberston Wright

Dr. Stephen Seymour

Basil Gill

President of the Federated States of Europe

Edith Barker Bennett

Minor Role

James Carew

Lord Rowleigh

Alf Goddard

Tele-radiographer

Judd Green

James Groves

Clifford Heatherley

Delegate

Hayford Hobbs

Charles Falloway

Raymond Massey

Member of Federated States Council

Wally Patch

Peace League Commissionaire

Rène Ray

Irene Rooke

Senator

Milton Rosmer

Ernest Stratton

John Singer

Boy

Kiyoshi Takase

Arms Manufacturers' Henchman

Henry Vibart

Lord Sycamore