A fuel transfer causes multiple explosions, a base jumper is swept into a raging waterfall and a man is saved from drowning after his helicopter crashes into water.
Destroyed in Seconds
Troy lays down a bet against Chase and Holden, Daniel's bragging wears Dwaine down, and Gunner causes trouble for Bruce.
The five remaining young geniuses must conquer two mind-bending rounds - advanced logic and world history as they advance to the $100,000 college fund prize.
Child Genius US
Captain Flint prepares for the final battle, while Billy tries to save Captain Vane from being hanged and Max must decide who she can trust.