Gilligans Island was a profoundly silly half hour comedy but in the 1970s thanks to syndication reruns it became immensely more popular and to this day is considered a cultural icon.
When the show was canceled after the third season it was considered a big surprise to all the cast members who had been making plans for the fourth season.
What if the show had been steadily renewed and gone on to a six, seven, or eight season run?