Why not just create a custom category for Star Trek, without placing it underneath a pre-defined category? That way you can also have Star Trek documentaries in there. As an aside, implementing hierarchical categories would either need a major database schema change and the corresponding code rewrite (and no doubt a slew of new bugs), or would suck in terms of performance and still need some ugly code. Having had a look at the database schema that's already in use for HT, it does not have the hallmarks of database design best practices. (I used to teach Database Design at tertiary level)
I was hoping HT could do multi level category/ hierarchy (something like JRiver). That way you could see movie series within the main category.
Would collections help there? Collections only work for Movies and a Movie can only be a member of one collection. Not very flexible either, I know. The collection mechanism seems to be reused for TV series, where a TV series is treated as a collection, a season is treated as a movie within that collection and episodes are treated as versions of the movie. You can actually disband a TV series to get individual seasons listed at the top level.
How would you do this view? Episodes>Season>Series>Category>TV Episodes>Season 1>The Sopranos>Drama>TV Would this be possible?
Easy. Use the filter icon on the top left of the poster screen. Select: Device: All Aggregation: TV Series Video: All Type: Drama Region: All Years: All Sort: Poster Name That will give you the poster screen where you select the TV show, which takes you to the season screen, which takes you to individual episodes.