Muppet Wiki's goal is to be as accurate and complete as possible, using the information that's currently available to us. On the pages, we try to track the earliest appearance that we can find for each insert sketch. There are over 4,400 episodes of Sesame Street, so assembling a complete episode guide is a long-term project. Therefore, we note the "Earliest Known Appearance" of each sketch, with the understanding that that information will change if we find an earlier appearance of the sketch.