Hello! Sorry to bother you on your wall, but I just wanted to quickly clear up the image thing, because you mentioned you didn't know-
Personally, I think the fastest way to switch from a single gallery to multiple ones is through the source code;
I just created two separate pages (One for Season one, one for season two) and then copied the entire source code of the gallery into the season one page's source code, effectively transferring it. (I put the crossover pics into season two- thank gosh there aren't many). Then all the original gallery page needs are the 'Gallery templates' linking to the new gallery pages.
Hope this helps! If not, feel free to ask for clarification :o (A bit unrelated, but moving images adds an ugly amount of points, and normally I wouldn't care but I'm just not comfortable with that, haha!)