Leland O'Driscoll (Self - Seismologist), David Yamaguchi (Self - Dendrochronologist), Chris Goldfinger (Self - Paleo-Seismologist, Oregon State University), Thomas Heaton (Self - Geophysicist), Joshu Mountjoy (Self - Marine Geologist), Alan Orpin (Self - Marine Geologist), Kenichiro Tani (Self - Volcanologist), Russell Boulter (Self - Narrator: National Geographic Channel), Craig Sechler (Self - Narrator)