|Andrew Duggan||Steven Thomas Ramsey|
|Delphi Lawrence||Louise Freed|
|Richard Anderson||Alexander Ramsey|
|Phyllis Thaxter||Rosemary Ramsey|
|Allen Emerson||Philip Karl Gayna|
|Anthony Eisley||S.A.C. Chet Randolph|
|Susan Seaforth Hayes (as Susan Seaforth)||Miss Hanes|
|Directed by: Robert Douglas
Written by: John W. Bloch
64. The Traitor
The Case of the Expatriate Traitor: Steven Thomas Ramsey-Espionage.
Original air date: 15 October 1967
This episode was not rerun by ABC
Andrew Duggan returns to America after an absence of 30 years, posing as a top corporate executive. In reality, he is a Communist agent. Inspector Lewis Erskine, posing as a Communist courier, uncovers a plot to steal top secret missle data.
In an atypical situation, Mr. Duggan plays a baddie. Likewise, Richard Anderson's character dies in this episode. And in a pattern seen in other FBI episodes, Mr. Duggan's character is deeply affected by this, since he himself had nothing to do with this dastardly deed.
- The episode begins with a murder that takes place during a baseball game in New York City.
- Anthony Eisley makes his first appearance this season.