Lunar Rainbow | SOVIET SCI-FI | English subs

Four cosmonauts survive a catastrophe in orbit around Uranus and come home with abilities nobody can explain, trailed by magnetic disturbances that a security commission has to decide what to do about. Andrei Ermash plays the fallout as a patient investigation rather than a spectacle, with a score by Eduard Artemyev.

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