== "Principal themes" section is only half as useful as it should be == 

 It is mostly, though not entirely, missing information on which tracks include which themes (and in at least one place, where it does give this info, it is missing info on which episodes the theme in question appears in). The track information is way more useful to the reader than the episode info, though the latter certainly doesn't hurt.  Both sets of details should be provided for each identified theme. — ''''''    ʕ(Õلō)ˀ  .