Buzz and Elron are both trying to win the science fair. Buzz makes a really cool volcano, but when the judge stops to see, well, it doesn’t go well. Elron builds a phenomenal robot. The judges are really impressed until the robot begins to grow and grow and grow and suddenly it's out of control. Buzz and Elron have to team up to stop it. Then, a spaceship appears-are things going from bad to worse? Turns out Elron is an alien and he's in big trouble.