Joe 90 is the world's most audacious secret agent and he's only 9 years old! Thanks to Ian 'Mac' McClaine's machine, the Brain Impulse Galvanoscope Record And Transfer (or BIG RAT), he is able to transfer the knowledge and experience of one person to Joe. BIG RAT becomes the World Intelligence Network's (W.I.N.) most guarded and secretive weapon in the organisation's missions. With the aid of a special pair of glasses, Joe can now assume the knowledge of any individual and become an expert in any field of endeavour....