"An FBI agent works with a refugee scientist and the Coast Guard to crack a Soviet spy ring in Boston."
George Murphy
as Inspector James 'Jim' Belden
Finlay Currie
as Professor Albert Kafer
Virginia Gilmore
as Millie / Teresa Zalenko
Karl Stepanek
as Alexi Laschenkov / Gregory Anders
Louisa Horton
as Mrs. Elaine Wilben
Peter Capell
as Chris Zalenko / Gino
Bruno Wick
as Luther Danzig
Vilma Kurer
as Mrs. Rita Foss
Ann Thomas
as Philadelphia Suspect
George Roy Hill
as Nicholas Wilben
Karl Weber
as FBI Agent Charlie Reynolds
Michael Garrett
as Michael Dorndoff aka Frank Torrance
Lotte Palfi Andor
as Anna Kafer
Ernest Graves
as Robert Martin
Robert Carroll
as Boldany
Wolfgang Zilzer
as August Helmuth
Bradford Hatton
as Harry Mason
Rosemary Pettit
as Mrs. Martin
Eva Condon
as Landlady
Steve Mitchell
as Samson
John Farrell
as
Nancy Hale
Westbrook Van Voorhis
Mary Young
Louis Applebaum
Original Music Composer
Leo Rosten
Story
J. Edgar Hoover
Writer
Alfred L. Werker
Director
Screenplay
Louis De Rochemont
Producer
Angelo Ross
Editor
Joseph C. Brun
Director of Photography
Herbert Andrews
Art Direction
George Stoetzel
Camera Operator
Lothar Wolff
Associate Producer
Thomas Whitesell
Unit Manager
Jack Shaindlin
Music Director
Lodge Cunningham
Sound
Shirlee Weingarten
Casting Director
Peter Ratkevich
Assistant Editor
Borden Mace
Edward Horton
