Started TZ with 20 minute classic episodes. Ended up several seasons later browsing content which are an hour in length. I understand back then TV was 'new' and people wanted more entertainment. But dragging along a plot unnecessarily and spelling everything out just to lengthen does not work when the same point could be made in 20 minutes. Same happens in modern times where producers feel like entertainment "has to" stick to a template or time frame.
Also as others pointed out genie gimmick became repetitive. I think by this time after producing so many episodes the creators were running out of ideas.
Also as others pointed out genie gimmick became repetitive. I think by this time after producing so many episodes the creators were running out of ideas.