The Black Windmill (1974) is a Thriller, Action, Crime film that follows a British agent's son is kidnapped and held for a ransom of diamonds. The agent finds out that he can't even count on the people he thought were on his side to help him, so he decides to track down the kidnappers himself. The Black Windmill is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 6.2 out of 10 from 96 votes. Fans of thriller movies may also want to explore similar titles below.