Desc: Riddles of the Sphinx: Directed by George Mendeluk. With Dina Meyer, Lochlyn Munro, Mackenzie Gray, Donnelly Rhodes. An astronomer and a cryptographer uncover a series of ancient tunnels, unwittingly unleashing a deadly Sphinx. In order to trap the Sphinx back in its tomb and stop impending destruction, our explorers must solve a series of complicated and possibly deadly riddles.