Dekalog (1989)

Season 1: Episode 9

“Thou shalt not covet thy neighbour’s wife.” Roman, after discovering his impotence, urges his wife Hanka to take a lover. She reluctantly complies, and Roman, despite his earlier words, becomes obsessively jealous. Spying on her, he learns of her affair, and vows to kill himself—not knowing that Hanka was in fact breaking off the relationship…