The show tells the continuing saga of Lloyd Nebulon a green-skinned alien (of the Verdigrean race) with strange ears and a single antenna sticking from his head. Lloyd lives in the Intrepidville Space Station along with his telekinetic and telepathic sister Francine and his mother, Commander Norah Li Nebulon, the Head of Intrepidville. Lloyd's friends are Eddie R. Horton (a red-haired teenage human), Kurt Blobberts (an enormous purple blob with a single eyeball and simple intelligence, of a species known as the Blobullons), and Douglas McNoggin (a giant brain with arms, feet).