There was this show in the 90's about Mary-Kate and Ashley being detectives or something. When I was really young I would always sit through the whole episode looking for Kate. (I thought Mary-Kate was two names. Like there was three girls, Mary, Kate, and Ashley.)
A childhood belief about tv

others believed things like this
- I thought "Virgin Mary" was actually "Verge 'n Mary" and that Verge was a nickname for Joseph. — Rachel
- I used to think virgin mary was actually 'virginia mary'Anon
- When I was a kid I thought Mary had a little lamb whose FLEAS were white as snow.— jen
- i thought "two pence a bag" from feed the birds from mary poppins was "toppins of ag"Anon
- I used to think my grandma was THE Mary Poppins.Anon
- I similarly thought that "Proud Mary" included the lyrics "pumped a lot of tanks down in New Orleans."— Larry