The biggest plot holes in Game of Thrones

Like everyone else, we've been glued to our screens since HBO brought George R.R. Martin's Song of Ice and Fire books to life with their hit Game of Thrones series, but that doesn't mean we haven't noticed a few omissions and oversights in the story. Most of these have to do with certain characters, factions, or events on the show whose current statuses are unresolved, and we're still wondering how such noteworthy plot holes could remain unchecked or overlooked. (As you'd expect, major, up-to-date spoilers await.)