As World War I comes to a close, Robert, Gaston, and Stubby fight until the last minute of the war.

Scientist testifies about the events that led to the explosion at Chernobyl.

The Planeteers are tasked by Gaia to stop a war between two tribes initiated by two-timing arms dealers. Appalled at the sight, Ma-Ti comments on how it is too difficult for him to see such suffering. Gaia profoundly comments that only when people understand the consequences of war would they possess the wisdom to stop it.

Gorbachev meets with a panel of people to discuss the update on the clean up from the explosion at Chernobyl. After being briefed on the clean up efforts, Gorbachev must make tough decisions on the next step.

Marcus tours a city in Lebanon that is known for its religious roots and trade industry.