Jake Lowenstern

饰：Himself - USGS, Yellowstone Volcano Observatory

Steve Sparks

饰：Himself - University of Bristol

Hank Heasler

饰：Himself - Co-ordinating Scientist, Yellowstone National Park

Eric Moody

饰：Himself

Nancy Ward

饰：Herself - Federal Emergency Management Agency

John Grattan

饰：Himself - University of Aberystwyth

Mark Maslin

饰：Himself - Environmental Change Research Centre, UCL

Alisdair Simpson

Alisdair Simpson

饰：Himself - Narrator

Bill McGuire

Bill McGuire

饰：Himself - Benfield Hazard Research Centre, London