My Father's Happy Years (1977)

Director Sandor Simo based this film on his recollections of a period in his father's life just after World War II. In the film, Janos Torok is a chemist and an entrepreneur With enormous enthusiasm, he gets loans to purchase a small chemical plant and begins experiments to create innovative products, such as hormones. Meanwhile, the communist party has come to dominate Hungarian life in such a way that his activities are viewed as little more than criminal. He is hauled away to a prison camp, but even then his letters home are full of boundless optimism and his ideas for further experiments.

Unfortunately the movie My Father's Happy Years is not yet available on HBO Max.