Adler makes the ultimate sacrifice to help Scarecrow, enlisting Will to preserve his legacy. Penny and Judy help John, Maureen, and John hatch a plan to regain control. After an alien invasion, the squad is faced with a heartbreaking proposition — should they send the 97 kids on a Jupiter with the engine? After the decision is made, Dr. Smith shockingly teams up with Maureen in order to keep the aliens from invading the Jupiter. Judy gets promoted to captain and inspires the kids while Don helps a distressed Maureen and John. Finally, Judy and her siblings come upon a wild discovery — that they are headed towards the Fortuna, the ship that Judy’s biological father was on.