Watch Prom Night III: The Last Kiss (1990) HD Full Movie Free on SolarMovie. Watch Prom Night III: The Last Kiss (1990) online free. The malevolent spirit of Mary Lou Maloney returns to Hamilton High, where she manipulates a naive ma...The malevolent spirit of Mary Lou Maloney returns to Hamilton High, where she manipulates a naive male student into helping her wreak havoc on the school.