First instalments have the most episodes of any season

If you're wondering, I'm talking about both Super Sentai and Power Rangers.

The longest-running Super Sentai season is Himitsu Sentai Goranger, which spanned 84 episodes from 1975 to 1977.

The longest-running Power Rangers season is the first season of Mighty Morphin Power Rangers, which spanned 60 episodes from 1993 to 1994.