Wikipedia
Hydrozagadka is a Polish superhero comedy film. During a summer heat wave, all the water in Warsaw is puzzlingly disappearing. Scientists secretly call upon As ( Ace), a superhero who passes his days living as a mild-mannered engineer, to try to solve the mystery. It turns out that a mystery Maharaja is in league with Doctor Spot to steal Poland's water and take it to the Maharaja's country.
The movie was ostensibly created as a Communist parody of the American ideals glorified in Superman and other superhero films, however Polish audiences instead felt the film humorously parodied aspects of Polish life under Communist rule, such as the many slogans for a "better life."
Hydrozagadka premiered on April 30, 1971 on Polish television.