The Man Who Doesn't Return

The Man Who Doesn't Return is a 1991 Soviet thriller film directed by Sergey Snezhkin. This fictional film's plot features a planned coup against the Soviet government. By coincidence, this made the film very topical because it aired on television on August 20, 1991, during a real coup attempt in the Soviet Union, one that lead to the Soviet Union's demise later that year.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.