Which episode of Sesame Street was Raphael Sbarge on when he was little?

Raphael Sbarge appeared on Sesame Street in the episode titled "Episode 0955," which originally aired in 1979. In this episode, he played the character of a young boy named "Marty." The episode is notable for its focus on friendship and community. Sbarge's appearance as a child actor is fondly remembered by fans of the show.