Sesame Street has reached its 50th anniversary, with the first episode being aired on November 10th, 1969. A group of developmental psychologists worked alongside the founders to help generate entertaining lessons for children. The popular show had numerous significant moments, as well as pushed the boundaries of what was acceptable during different times, such as having a multi-racial cast in the 60s and 70s. The real-life death of one of the original cast members was used to help explain death to young children instead of simply writing the actor out of the series in 1983. Other ways Sesame Street strove to relate to the real world was having a Muppet with HIV, a character experience homelessness, and a Muppet who has autism.