When space thief Gadfly Garnett sneaks onboard the Stellosphere and blasts away with Miles and M.E.R.C. still inside, Miles' UNCLE Joe, captain of the SpaceGuard, comes to the rescue.

Miles goes on a ride-along with his uncle, Captain Joe of the SpaceGuard, and finds himself in pursuit of space villain Gadfly Garnett.

Miles must help his family when a giant winged creature mistakes the Star Jetter for its egg.

When the Callistos' have dinner at alien chef Lysander Floovox's new restaurant, their meal is interrupted by Gadfly Garnett.

Gadfly helps the Callistos locate stolen space equipment.

Miles, Loretta and Auntie Frida's trip to Pluto coincides with Commander S'Leet's plan to take over a planet.