When I was little, KTTV Channel 11 (the Fox affiliate in Los Angeles, CA) showed reruns of "Small Wonder." I had a HUGE crush on the main character, Vicki the Robot. I used to believe that she/it was real. I even used to insist that said belief was true. But then I came clean. She/it was played by a very human girl (now almost-30-year-old woman) named Tiffany Brissette. Even to this day I remember the show's theme song by heart, but this is not the place for me to post it. You probably remember it, too.
A childhood belief about tv shows

others believed things like this
- I used to think that the actors on tv shows sang the show's theme song.Anon
- Until I was about 15, I beleived my Father was the person who sang the "Cheers" TV Show Theme Song.— Dustin
- Does anybody remember that song "OUT OF REACH" well i remember i used to sing it as "BATTEERRRRYYY". — meeeeeeeee
- I used to believe that the heart at the beginning of the I Love Lucy Show was made of real chocolate.— Krissa
- The song called heart of glass mixed me up as a kid. I heard "Heart and ass". — oops
- I remember thinking that the "Nude Furniture" store was some sort of naughty place. — Texas Rocky