Tanya: Tatyana Samoylova
Andrey: Vasiliy Livanov
Sergey: Evgeniy Urbanskiy
Vera: Galina Kozhakina
Director: Mikhail Kalatozov
Screenplay: Grigoriy Koltunov, Valeri Osipov, Viktor Rozov
Cinematography: Sergey Urusevskiy
Production design: David Vinitsky
Film editing: N. Anikina
Music: Nikolai Kryukov
Letter Never Sent tells the story of a team of Soviet prospectors and geologists searching for diamonds in the Siberian wilderness who are trapped when a forest fire breaks out. A beautifully filmed adventure story, it's also overlaid with Soviet patriotism, from an opening title sequence that lauds the heroic pioneers of Soviet exploration and the space program, to occasional interpolated speeches in which the characters extol the country's shining future. The diamonds, it seems, are not bourgeois capitalist gemstones but minerals essential to the advancement of Soviet industry. Fortunately, the adventure story overwhelms the propaganda.