I used to like "Gilligan's Island" as a kid, and one time they revealed the Skipper's real name ( Jonas Grumby) I think in a radio announcement. I misunderstood and thought they said the Skipper was "KNOWN as Grumby" which I believed for years.Also I thought Gilligan's name was "Gilligan Mulligan" like the stew.I don't know where that came from.
A childhood belief about tv

others believed things like this
- That the District of Columbia was an island in the Carribean. I believed this until I was about 19 yrs old. Anon
- I used to think that Alaska was an island!— Draqula
- i used to believe that 'island' was pronounced 'is-land' instead. I know im not alone on that one! :)
— Da KornMeal - i used to believe alaska was an island because of the way they put it on our booksAnon
- I used to believe that Ireland was called that because it really is an island!Anon
- i used to think easter island was called that because a giant bunny ran around and layed eggs there. — Oliver