Sesamo apriti

When Will Lee died, the production staff decided not to cast another actor as neighborhood grocer Mr. Harold Hooper. Instead, they wrote a special episode dealing with the loss of a loved one ("Goodbye, Mr. Hooper"). When the other cast members talk to Big Bird about the death of loved ones, some are visibly near tears. A child psychologist was brought in to help the writers. The episode announcing Mr. Hooper's death was scheduled for a public holiday, and was publicized in many newspapers so parents could be prepared to answer their children's questions. They were very careful not to say that Mr. Hooper died in a hospital, to avoid making children fear going to the hospital. In polls, fans have consistently voted this episode as the most moving and memorable.

During the final stanza of the Anything Muppets' song "J Friends", when the four Muppets jump up at the line "Let's jump with Jane", the hair and forehead of Muppet performer Frank Oz are briefly visible at the bottom of the screen.

Most episodes aired from 1969 to the 2000s do not have complete closing credits; ending credits usually appeared at the end of the Friday installment, or when another weekday episode ran short.

In 2006, selected episodes from the first five seasons of the series (1969-1973) were released to DVD. Due to rights issues regarding music and some footage, slight edits were made to these episodes, sometimes involving substituting other segments. In addition, the 5 complete episodes in the set (entitled Sesame Street: Old School Vol. 1) are each preceded by newly made animated segments introducing each episode.

Edited from Luxo Jr. in 'Surprise' and 'Light & Heavy' (1991)