The series finished because Southern Television lost its franchise. Much to Jon Pertwee's bemusement, no other company would take it despite its ratings success.
This series had a long journey to the screen. Keith Waterhouse and Willis Hall intended to make it as a movie and wrote a script. They asked Jon Pertwee to play the role but were unable to raise the money or the distribution. Pertwee asked them to write a pilot for television but the BBC and Thames Television turned it down before Southern Television picked it up.
Although it was primarily a children's series, Jon Pertwee said in an interview that 65% of the viewers were adults.
Its unclear who owns the rights to this television version of Worzel Gummidge, although the bulk of the surviving Southern Television archive rights, films and tapes are owned by Talking Pictures, which uses that archive as part of their archive television channel. Worzel Gummidge was possibly spun out of the Southern Television archive, when they lost the franchise, as it was, in effect, an independent third party Intellectual Property.