Sherwood Schwartz planned for at least two more seasons of 'Gilligan', if CBS wanted it.hipman2 said:and IMHO, Gilligan's Island. Could have run two more years, then the cast get rescued and the series comes to an end. NBC ended up banking on the GI reunion movies to put a closure on the lost castaways.
Season 4 would have written Tina Louise/Ginger off the show by having her 'drift out to sea' and be rescued by a cruise ship...although she would have bumped her head and, naturally, lost her memory. Schwartz planned to replace Ginger with two new characters, similar to the two secretaries who were in the unaired pilot from 1963.
At the end of the fourth season, Schwartz would have finally had the castaways rescued...but if CBS STILL wanted the show, then he would have used the premise that eventually was used in the 'Castaways on Gilligan's Island' TV-movie in 1979-the gang would return to the island to run a resort.