Gentlemen of Fortune

Gentlemen of Fortune (Russian: Джентльмены удачи, translit. Dzhentlmeny udachi) is a Soviet comedy, filmed at Mosfilm. The stars of the film include famous Soviet actors such as Savely Kramarov, Yevgeny Leonov, Georgy Vitsin, and Radner Muratov.
The film was the leader of Soviet distribution in 1972 having 65.02 million viewers.
The movie follows the story of an amiable kindergarten director named Troshkin who looks exactly like a criminal called Docent (Доцент, literally associate professor) that has stolen Alexander the Great's helmet at an archaeological excavation. Docent and his gang are caught by police, but Docent is imprisoned in a different jail than his mates. Since Troshkin looks identical to Docent, the police send him undercover to prison with the real criminals to get information about the stolen helmet. He must pretend to be the real felon Docent, so in order to be convincing, Troshkin, a well-educated and good-natured man, has to learn slang and manners of criminals.