Before the concept of WIN was devised, Joe was to have become the "Most Special Agent" of the CIA.
Also available were Joe's WIN briefcase (complete with replica gadgets and pistol) and his WIN badge (reading "Most Special Agent").
In addition to the themes and tracks for the pilot, "The Most Special Agent", Gray composed incidental music for 20 additional episodes of Joe 90.
Since a boy would never be suspected of espionage, Joe's innocence is as useful an asset as the BIG RAT, and he comes to be regarded as WIN's "Most Special Agent".
The series reached the Harlech and Channel regions in November and finally Granada on Christmas Day, although the first episode to air was the Christmas-themed "The Unorthodox Shepherd" rather than the pilot, "The Most Special Agent".
The script for the pilot (titled only in production documentation as "The Most Special Agent") was written by Anderson and his wife, Sylvia, as was the custom for every new puppet series that the couple developed in the 1960s.
Equipped with the skills of the foremost academic and military minds, Joe is recruited by the World Intelligence Network (WIN) and, as its "Most Special Agent", pursues the objective of world peace and saving human life.
Material for "The Most Special Agent" was re-edited to remove the framing sequences set at Culver Bay Cottage and WIN Headquarters London, with the result that Joe's fictitious mission to steal the Russian prototype fighter appears to be a real assignment for the nine-year-old WIN agent.
In 1981, a compilation film of the Joe 90 episodes "The Most Special Agent", "Splashdown", "Attack of the Tiger" and "Arctic Adventure", titled The Amazing Adventures of Joe 90, was created under the supervision of Robert Mandell of ITC Entertainment's New York offices.
Released in an eight-volume series and re-packaged in 1992, the set included "The Most Special Agent", "Splashdown", "Attack of the Tiger" and "Arctic Adventure" in their re-edited forms from the 1981 compilation film The Amazing Adventures of Joe 90, which itself received three video releases both in PAL and NTSC format between 1981 and 1986.
