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The Eternity Ring

Series 7 Episode 1

When Christopher Foyle returns from America, MI5, suspicious that British atomic research has been infiltrated, asks Foyle to investigate whether a Russian spy network could be at work in the heart of London. In signing on, he's reunited with the now-married Sam who is working for a scientist involved in the development of the atom bomb.

When Christopher Foyle returns from America, MI5, suspicious that British atomic research has been infiltrated, asks Foyle to investigate whether a Russian spy network could be at work in the heart of London. In signing on, he's reunited with the now-married Sam who is working for a scientist involved in the development of the atom bomb.

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