INCIDENT IN SQUARE 36-80 | Action | Full movie

A deranged sailor aboard a stricken American submarine launches two missiles at Soviet ships on exercise in the North Atlantic, and both navies have hours to stop an accident becoming a war. Mikhail Tumanishvili shoots it as a procedural of radio rooms and helicopter decks rather than a duel between flags.

Why it's free: Free on Mosfilm's own channel; Mosfilm holds the rights to the Soviet-era library it publishes.