sentences:  They arrive in time for Duggan to knock Scaroth out before he can reach the ship.Scaroth returns to present Earth, where he is discovered in his alien form by his bodyguard, and they get into a fight which damages the equipment and sets the mansion on fire, killing them both.By the time the Doctor, Romana and Duggan arrive, the original "Mona Lisa" and 5 of the 6 copies have been burned in the fire, but the last copy remains safe.