It's possible you're referring to the "Super Why!" television series which premiered on September 10, 2007, on PBS Kids.
The series consists of multiple episodes, each telling a different story. Unfortunately, without a more specific title or description, it's impossible to pinpoint the release date of the particular episode you're searching for.
To find the specific release date you're looking for, you could try:
* Searching for a list of "Super Why!" episodes online: Many websites have episode guides or lists that might include the release date.
* Checking the PBS Kids website: You can check the website for episode information or potentially a calendar of airings.
* Using a TV guide: Traditional TV guides or online services might have episode listings and air dates.
Please provide more context or details about the episode you're interested in, and I'll do my best to help you find its release date.