Characters played by Dana Andrews
Igor Gouzenko
Characters played by Gene Tierney
Anna Gouzenko
Characters played by June Havoc
Nina Karanova
Characters played by Berry Kroeger
John Grubb
aka 'Paul'
Characters played by Edna Best
Mrs. Albert Foster
Characters played by Stefan Schnabel
Col. Ilya Ranov
Characters played by Nicholas Joy
Dr. Harold Preston Norman
aka 'Alec'
Characters played by Eduard Franz
Maj. Semyon Kulin
Characters played by Frederic Tozere
Col. Aleksandr Trigorin
Characters played by Leslie Barrie
Editor
Characters played by Noel Cravat
Bushkin
Characters played by Anne Curson
Helen Tweedy
aka 'Nellie'
Characters played by Helena Dare
Capt. Kulin
Characters played by John Davidson
Secretary to the Minister of Justice
Characters played by Michael Dugan
Policeman
Characters played by Reed Hadley
Narrator
Characters played by Mauritz Hugo
Leonard Leitz
Characters played by Christopher Olsen
Andrei Gouzenko
Characters played by John Ridgely
RCMP Officer Murphy
Characters played by John Shay
Lt. Josef Sergeyev
Characters played by Brick Sullivan
Bailiff with Hollis
Characters played by Charles Tannen
Radio Commentator
Characters played by Ken Terrell
Spy on Trial
Characters played by Joe Whitehead
William W. Hollis
Characters played by Peter Whitney
Cipher Lt. Vinikov
Characters played by Victor Wood
Capt. Donald P. Class