An FBI agent works with a refugee scientist and the Coast Guard to crack a Soviet spy ring in Boston.
as Inspector James 'Jim' Belden
as Professor Albert Kafer
as Millie / Teresa Zalenko
as Alexi Laschenkov / Gregory Anders
as Mrs. Elaine Wilben
as Chris Zalenko / Gino
as Luther Danzig
as Mrs. Rita Foss
as Philadelphia Suspect
as Nicholas Wilben
as FBI Agent Charlie Reynolds
as Michael Dorndoff aka Frank Torrance
as Anna Kafer
as Robert Martin
as Boldany
as August Helmuth
as Harry Mason
as Mrs. Martin
as Landlady
as Samson
as Taxi Driver (uncredited)
as Mrs. Belden (uncredited)
as Narrator (voice) (uncredited)
as Old Lady (uncredited)
as Sherry Belden (uncredited)
