Foyle's War (2002–2015)
9 user 1 critic

The Eternity Ring 

MI5 suspects British atomic research has been infiltrated and asks Foyle to look into whether a Russian spy network could be at work in the heart of London.



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Episode cast overview, first billed only:
Max Hoffman
Professor Fraser
Kate Duchêne ...
Helen Fraser (as Kate Duchene)
American Scientist
Dylan Charles ...
Aleksei Gorin
Tim McMullan ...
Joe Duttine ...
Frank Shaw
Ellie Haddington ...
Sir William Chambers
Ruth Shaw
Sam Clemmett ...
Jack Shaw
Gyuri Sarossy ...
Tomasz Debski
Steve Wilson ...
Duty Police Officer


1945:- A group of scientists observe the testing of an atomic bomb at Los Alamos in the New Mexico desert. A year later Foyle is approached by Hilda Pierce, now working for MI5. Her boss Sir William Chambers explains that a Russian defector, Gorin, has supplied them with news of the Eternity Ring, a group of Soviet sympathisers bent on betraying Britain's atomic secrets. Sam is now working as a secretary to Professor Fraser, one of the suspects who was present at Los Alamos and Foyle meets up with her, being introduced to Fraser and his colleague Max Hoffman, a Polish communist who escaped Nazi persecution. Both work at Armwell Atomic Research Station. Hoffman connects Sam to Foyle and she is sacked but when uranium is stolen from Armwell and the thief murdered, she joins Foyle in investigating the Eternity Ring - as well as helping husband Adam stand for election as a Labour MP. Written by don @ minifie-1

Plot Summary | Add Synopsis


Crime | Drama | Mystery | War




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Release Date:

15 September 2013 (USA)  »

Filming Locations:


Company Credits

Show detailed on  »

Technical Specs



Aspect Ratio:

16:9 HD
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Did You Know?


The character "Aleksei Gorin" is loosely based on the Soviet defector Igor Gouzenko. See more »


When talking to his wife, Adam Wainwright describes the West Peckham seat for which he hopes to be selected as a safe Tory seat (i.e. he has virtually no chance of being elected for Labour). However, the woman on the interview panel describes it as a marginal seat (a much more close-run thing). See more »


[first lines]
Max Hoffman: Professor Fraser, Max Hoffman. We met briefly.
Professor Fraser: At Oak Ridge, Tennessee. Yes, yes, I remember.
Max Hoffman: I love your work of course, Professor, and I'm, I'm delighted to see you.
Professor Fraser: My wife, Helen; she works as my assistant.
Max Hoffman: Ah. Pleased to meet you, Mrs. Fraser.
Helen Fraser: How do you do?
Max Hoffman: Ah, come, come. We should finish and get inside. The test will be starting soon.
See more »


Red Flag
Lyrics by Jim Connell
Music by Ernst Anschütz
Hummed by Honeysuckle Weeks
See more »

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User Reviews

The World Under Siege
23 September 2016 | by (United States) – See all my reviews

This is a very good episode that involves the development of nuclear weapons. The story begins, as we find out later, in New Mexico, as the U.S. tests an atomic bomb. Scientists are there to watch the explosion and immediately become aware of the incredible power. Foyle now becomes entrenched in the case of the possibility of theft of fissionable material and the misuse of power. We are made aware of a numerous factions which may put their mark on things. Of course, the Russians are at the root of everything, but with espionage, there are so many gray areas, especially when it comes loyalty. In other issues, we find that Sam and her husband are embarking on a political career for him. She tries to help and it causes her great distress. We are again reminded as well that the end of the war did not make it nice for everyone.

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