GLEE: Will (Matthew Morrison) addresses the new and old kids in the glee club in the “100” episode of GLEE airing Tuesday, March 18 (8:00-9:00 PM ET/PT) on FOX. ©2014 Fox Broadcasting Co. CR: Adam Rose/FOX

The 100th episode of Glee airs tonight, and while the show’s most lasting legacy will likely be its music, it’s important to remember just how unafraid of tackling issues the show has been — any issue! All issues! No social problem is too large, no interpersonal conflict is too small, and no feline behavioral issue is too ridiculous. These are the 294 issues that have ensured that each and every Glee is basically a Very Special Episode.