All 16 episodes from the second season of the post apocalyptic teen drama 97 years after a nuclear war almost destroys the earth 100 expendable youths are sent to their ancestors former home to determine if its surface is habitable with the hope of repopulating the planet as the 100 begin their quest they are forced to confront dangers in a world they have only seen from space and soon discover they may not be alone on earth in this season they continue to encounter dangerous obstacles in