Tehani, Traven, and Keakealani visit the U.S. Geological Survey's Hawaiian Volcano Observatory to explore an active volcano zone, and meet with geophysicist Dr. Jim Kauahikaua and engineer Kevan Kamibayashi. Then the road-trippers island-hop over to Maui, where their tour of the NOAA Hawaiian Islands Humpback Whale National Marine Sanctuary is crashed by some surprise visitors.