Not being able to implement his invention in his home country, engineer Arrowsmith, the author of the patent for ore flotation, goes to the USSR to work at one of the flotation plants, where he soon learns that a group of Soviet engineers is conducting similar work.
Dick Arrowsmith
Layons
Samuel Wolfe
Engineer Nikitin
Sazonov
Bill Steer
Rector (uncredited)
Comrade Olga
Gostev
Bistayev
Gaydar
Garreth
Rakitin
Ethel
Professor (uncredited)
Felice (uncredited)
John's wife
Laboratory worker (uncredited)
Arrowsmith's guest
Arrowsmith's guest
The reporter (uncredited)
The worker (uncredited)
The provocator (uncredited)
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