Gilligan's Island. Aired: April 17, 1967 ("Gilligan, The Goddess"). Three seasons and 98 episodes on the island later, producer (and theme-song writer) Sherwood Schwartz planned for a fourth season -- so he left the castaways stranded. Problem was, the series got canceled, so it took until 1978, when the first of two reunion movies aired ("Rescue from Gilligan's Island"). (The second, "The Castaways on Gilligan's Island" was a pretty obvious attempt to kick-start a new series on dry land.) In short, they got off the island, having missed most of the Vietnam War, Watergate, and the Bicentennial. Talk about a readjustment problem.