'Double Agent' by Tony Barwick

After three of his couriers are mysteriously killed while travelling by airplane, Shane Weston suspects a traitor in the World Intelligence Network. Joe is given the brain patterns of courier chief Harry Sloane and sent to deliver some secret cipher codes. However, the young boy is unaware that Sloane is the double agent – and the traitor’s next target is agent Joe 90 himself…

Len Jones (Joe McClaine), Rupert Davies (Professor Ian 'Mac' McClaine), Keith Alexander (Sam Loover / Doctor Newman / Sherman / Courier A14), David Healy (Shane Weston), Jeremy Wilkin (Harry Sloane / Miller), Sylvia Anderson (Mrs. Harris / Stewardess), Shane Rimmer (Radio Control)

Directed by Ken Turner
Produced by David Lane
Executive Producer Reg Hill
Created by Gerry and Sylvia Anderson

TX:
UK (ATV Midlands):
January 12th, 1969

Notes:
*Featuring Joe 'Joe 90' McClaine, Professor Ian 'Mac' McClaine, Sam Loover and Shane Weston