The evil Dr. X, who stowed away, has taken over the ship and is piloting them off-course.
He has sealed himself on the bridge. He tells them through the ship’s speakers that he is going to shut off power to all of the rest of the ship and they will die.
He can’t risk these “children” being in control of the mission.
It turns out to be a room that allows you to imagine you are anywhere, at any time.
They imagine that they are back on Orth, during the building of the rocket ship and they observe the special codes that Dr. X designed into the ship to allow him to take over the ship.
With that knowledge, and BARNIE’s help, the leave the “travel” room and take back control of the ship.
Dr. X runs from the bridge, towards an emergency shuttle craft, in which he flees.
They watch him and pursue him for a brief time when, all of a sudden, it explodes in space.
They ask BARNIE if there was a malfunction, when they realize that, no, it was struck by a missile.
Just then, the on-board computer tells them that they are approaching a space station.