Q: Would like to edit metadata for bought TV eps; i.e. rename titles

So I bought both seasons of the TV show Blandings recently via iTunes. While the episode titles of S1 show up perfectly fine in my library listings, S2's only show up as "Episode 1," "Episode 2," and so forth.

I figured I might as well rename the episodes with their actual names manually, but I cannot edit their metadata (after right-clicking and getting their info). My version of iTunes is the latest version, 12.5.1.

So...anything I can do to sort this out? It's obviously not a major inconvenience, but it's something that would be nice to see fixed sooner or later.