It could be and that's what I assumed up to this episode. However, they left a lot of things open by saying PC principal is here to stay (assuming that wasn't just a larger metaphor). That's pretty much saying right there (if taken literally) that at least some of the elements of that episode will be sticking around.…

Last season they toyed around a lot with having the plot of previous episodes affect the following. That combined with the end stating that PC principal isn't going anywhere leads me to believe this is likely a building a foundation other episodes may take greater advantage of. I could be wrong but I doubt it. Even if…