Joe 90
Joe McClaine
Nine-year-old Joe is just a normal schoolboy, until he is called upon by the World Intelligence Network to become their most special agent. Making use of his father's machine, he is implanted with specialist brain patterns to complete his daring missions.

Voiced by Len Jones
Professor Ian "Mac" McClaine
The inventor of the BIG RAT (Brain Impulse Galvanascope Record And Transfer) that gives Joe his specialist knowledge, and Joe's adopted father.

Voiced by Rupert Davies
Shane Weston
Head of the London office of the WIN and the first to see Joe's potential as a secret agent.

Voiced by David Healy
Sam Loover
Deputy head of WIN London and Joe's contact in the organisation.

Voiced by Keith Alexander