Ben Bril a Choedwig y Ninja

Fourteen year-old Ben Bril is very clever, but he's interested only in science and in saving the world! Sgilti has joined a gang of Ninja crooks. Sarjant Cyffion has even got him on CCTV holding up a truck full of gold bars. Can this be true? Has Sgilti joined the dark side? Can Ben Bril save him? A Welsh adaptation of Boffin Boy and the Invaders from Space.