The silent Sir Arthur Conan Doyle story of Professor Challenger heading an expedition into darkest Africa to bag dinosaurs. Great effects (INCREDIBLE for the time) by Willis O'Brien, who did the stop motion for KING KONG. Extras: commentary, restored outtakes, bonus short films: THE GHOST OF SLUMBER MOUNTAIN and R.F.D. 10,000 B.C., CREATION, image gallery, and booklet.