George Casey The Eruption of Mount St. Helens! The Eruption of Mount St. Helens! Amazing Journeys Alaska: Spirit of the Wild Africa: The Serengeti Ring of Fire Ring of Fire Сили природи Probes in Space The Great Barrier Reef The Great Barrier Reef Planet Ocean Alaska: Spirit of the Wild Africa: The Serengeti Africa: The Serengeti Amazing Journeys The Great Barrier Reef Search for the Great Sharks Ring of Fire Seasons Genesis: Four Billion Years in the Making