This is the first episode of the series.
Ed, Edd n Eddy (1999) was originally optioned for Nickelodeon Network. When they wouldn't allow Danny Antonucci full creative control, he pitched it to Cartoon Network, who allowed him full creative control of the series.
This was the second episode produced, but it aired as the series premiere because Cartoon Network wanted to air these episodes out of production order, it premiered first.
Eddy mentions that jawbreakers cost a nickel. Throughout the rest of the series, jawbreakers always cost a quarter.
Edd is the first character we see in the series.