Childhood's End (2015)

S1E11 Man at the Window

Title: Man at the Window Plot: Arthur Brown, a former drug-addicted screenwriter, becomes obsessed with Diane Hampton's life and her story. Meanwhile, Diane is caught in a tumultuous marriage with her possessive husband, John, while secretly pursuing a relationship with her girlfriend, Cathrine. As Arthur divulges information about Diane's infidelity to John, he inadvertently puts himself in the crosshairs of John's fury, escalating tensions and leading to a dangerous confrontation.