"In Game of Thrones I think it's less of a big deal to just stretch out the timeline to account for aging. The first five books take place over the course of 3+ years. The show will take place roughly over the course of 8ish, which I think it can manage because the passage of time in the show is pretty obfuscated, it's rarely clear how much time has passed between events. On Walking Dead it's clearer how much time is passing, which makes Carl's aging problematic. I always sort of assumed they'd kill the character before it got to be noticeable, but at this point I guess they'll just ignore it." - Eric P