sam., 26 mars 1955
Astro suffers psychological trauma after an accident in space and the Space Academy staff fears that the young cadet will never be able to serve as a spaceship officer again. When the Polaris is confronted by a deadly peril, Astro must confront his darkest fears or allow his fellow cadets to perish.
sam., 4 juin 1955
Tom, Astro and T.J. are delivering a battered spaceship to a Venusian shipyard to be junked when the engines malfunction and the cadets are forced to abandoned ship. The three men land in a remote swamp and, after reuniting manage to find their way to a rescue station. Their relief is short-lived when nearby volcanoes suddenly become active and threatens to kill the cadets with their heat and deadly gas before they can be rescued.
sam., 11 juin 1955
Commander Arkwright agrees to take an astronomy professor on a flight into deep space to get a better view of a supernova, but when the professor ignores the Commander's orders and takes down the ship's ultraviolet protection, he blinds himself and the Commander - the only crew members aboard their ship. Tom and the Polaris' crew are called upon to perform a dangerous rescue.
sam., 25 juin 1955
The cadets are taking their final exams and must pass in order to graduate from the Space Academy. Astro, a genius with a toolbox, freezes taking his nucleonics test and it looks like he may flunk out of the Space Academy. While awaiting his fate, he joins Tom, T.J. and Eric on a flight into deep space and must repair their spaceship's engines when Captain Strong unknowingly fires space torpedoes at their vessel.