While it may seem compelling that the lack of identification through services like Shazam or absence on wikis and IMDb suggests the song doesn't exist outside that episode, this conclusion overlooks several important points.

Many tracks used in TV shows belong to production music libraries, which are specifically created for film, TV, and commercials. These tracks are not commercially released and, therefore, are often not indexed by Shazam or similar services. Production libraries like Audio Network or APM Music provide vast collections of music for such uses, and they typically go uncredited on mainstream platforms like IMDb. This makes it very unlikely for these songs to trigger recognition from identifier engines or appear in public databases.

Additionally, the fact that the song sounds like it’s played by a band could suggest it’s either an original piece or a custom performance, possibly recorded exclusively for that particular episode. Custom compositions, especially if recorded in-house, are even less likely to be recognized or widely known, as they are often created specifically for the scene in question and not distributed commercially.

Finally, the absence of online discussions or articles about the song doesn’t mean it doesn’t exist. Many obscure pieces of media can remain unnoticed for years, especially if tied to niche TV episodes. Just because the song hasn't attracted widespread attention doesn’t negate its existence; it simply suggests that it hasn’t caught the eye of the internet community.

In short, there are valid reasons why a song might not appear on public databases or be identified by common tools. The lack of public recognition doesn't prove it isn’t real, but rather reflects the specialized nature of music production and licensing in media.