Disastrous events have sparked a wave of interest in preparing for the end of the world. Jeff meets the Southwick family of "Doomsday Preppers," who have dedicated their lives to preparing for the next major disaster. Jeff also tests their on-the-spot abilities with a surprise mock earthquake. Plus, survivalist trainer Alton Edwards shares the basic necessities to have on hand in case of an emergency. Later, George Wright and Scott Lomu, the stars of "Jungle Gold," reveal the incredible dangers they face in their search for riches in the jungles of Africa.