The Secret Signal

Space Station Oberon is under threat and Hal Junior must risk his life to save everyone on board!

When a supply ship docks with the space station, Hal's class is invited aboard for a tour. Normally, their robot teacher would take charge of the excursion, but he's mysteriously gone missing.

Once aboard the ship, Hal Junior uncovers a plot against the Space Station. It's up to him to save the day... but it's not going to be easy!