sentences:  "Black Christmas" has three alternate endings, the second of which was used as the actual ending for the UK theatrical release of the movie.In the UK ending, Billy dies on the operating table from his wounds, thus when Kelli kills Agnes, the scene ends there with her parents picking her up from the hospital.The third ending is similar, having Billy die and Kelli's parents picking her up, however his body disappears and the last shot shows someone moving through the vents, indicating that either Agnes or Billy are still alive.