An example of the advanced technology demonstrated is Professor Mc Claine's "Jet Air Car": a multiple-configuration land-, sea- and air-based vehicle built prior to the events of the series.

explaining, "I read somewhere that the human brain is controlled by electrical impulses and how thoughts are stored electronically.

I started toying with the story potential of a process that would allow the recording of brain patterns and transferring them to another brain.

Since he was occupied by post-production on the second Thunderbirds feature film, Thunderbird 6, and the development of his live-action film, Doppelgänger, Gerry Anderson was unable to fulfil the producer role as he had done for Captain Scarlet, and instead passed the responsibility to Reg Hill and David Lane.

Other directors for Joe 90 included Leo Eaton, Alan Perry and Ken Turner, all of whom had contributed to Captain Scarlet, and Peter Anderson, who was promoted from his earlier position as assistant director to replace the outgoing Brian Burgess and Robert Lynn.

Maybe the whole thing was becoming a bit narrow; all the ideas were becoming similar." Stephen La Rivière, writer of Filmed in Supermarionation: A History of the Future, views the Jet Air Car as an update of Supercar, the vehicle that appeared in Anderson's 1961 series of the same name, but agrees that while the Jet Air Car is the "star vehicle" of Joe 90, The Supermarionation puppets featured in Joe 90 are of the more accurately proportioned kind introduced for Captain Scarlet, and which would also be used for the Andersons' final puppet series, The Secret Service.

Simultaneously, the drive for enhanced realism across all major design aspects which started with the preceding series and Mrs Harris.

Although not as successful as Century 21's previous efforts, Nine-year-old British schoolboy Joe Mc Claine is the adopted son of Professor Ian "Mac" Mc Claine, a computer expert.

Outwardly, the Mc Claines are an unexceptional father and son; they live in an antiquated Elizabethan-style cottage overlooking Culver Bay in Dorset, and are waited on by their housekeeper, Mrs Harris.

The Secret Service, the Andersons' next production after Joe 90, developed the hybridity further with the incorporation of extensive footage of live actors in long shot, intercut with scale puppet sequences.