Legend of the Lost Tomb.

While excavating near the Pyramids, Dr. Leonhardt finds a small box with a map to the treasures of the Pharaoh Ramessess II. On his way to deliver this to the local authorities, he is kidnapped by his nemesis Dr. Bent. Before Bent can retrieve the papyrus map, Karen, who is Leonhardt's student assistant, and John, Leonhardt's son take the map to look for Leonhardt. They soon find that Bent is in hot pursuit and they figure that the only way to save Leonhardt is to be the first to the treasure so that they could ransom the Doctor from Bent. But Bent has other plans for all three of them.