Strong with Spirit (Russian: Сильные духом, romanized: Silnye dukhom) is a 1967 Soviet spy film directed by Viktor Georgiyev based on a screenplay by Anatoli Grebnev and Aleksandr Lukin.

It tells the story of the Soviet intelligence officer Nikolai Kuznetsov.

The picture was the 26th most attended domestic film in the Soviet Union.

[1] The film is about the Soviet intelligence officer Nikolai Ivanovich Kuznetsov.

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