At the end of the act, after the mounting tension drives the guests to leave, Sam carries Jo up to bed. Suddenly, a fourth couple appears from the wings: a glamorous older woman (Elizabeth) and her black companion (Oscar).
At the end of the play, after the heightened tension forces the guests to depart, Sam lifts Jo to bed. A fourth couple then emerges from the wings: a glamorous older woman (Elizabeth) and her black companion (Oscar).