Young Joe McClaine is known as W.I.N.'s Most Special Agent, because his adoptive father, Professor Ian McClaine, has created a special device known as the BIG RAT, which enables Joe to aquire the skills and knowledge of any kind of person, from Aquanauts to Astronauts, from piano players to brain surgeons. Other main characters are Sam Loover who is the Deputy Head of the W.I.N, London office and a close personal friend of Professor McClaine. Shane Weston is W.I.N's Deputy Head and London office Supreme Commander. Finally Mrs. Ada Harris is the housekeeper at Professor McClaine's Culver Bay cottage.