Sesame Street (Pilots and Pitches)

Before Sesame Street premiered on November 10, 1969, the show was offered to various Networks. Four test pilots were shown under the title "CTW model" and "My Street". It was suppose to be targeted more for adults, and was to teach the viewers how their actions can impact other's feelings. Test screening shows that kids were more interested in learning rather then hearing about the friendly environment. So it was decided to still have humans, but Muppet's alongside too. The title was later changed to "Sesame Street" to match up their original concept.

Availability
Only handful of screenshots have surfaced, and not clips exist. Only test 1 is available online, and the rest are completely lost.