Hal Junior lives aboard a futuristic space station. His mum is chief scientist, his dad cleans air filters and his best mate is Stephen 'Stinky' Binn. As for Hal - he's a bit of a trouble magnet. He means well, but his wild schemes and crazy plans never turn out as expected! Hal Junior: The Secret Signal features mayhem and laughs, daring and intrigue... plus a home-made space cannon!