If you click on the tab “show” and scroll down to “The Story” you can find yourself taken up to speed on what is currently going on. As what I can tell from this website is that there are only 5 seasons to catch up on. However they are currently on season 6. “The Story So Far” gives you a brief summary of what happened in that one season. As well as giving you information of how many episodes it has. It doesn’t go into too many details to encourage viewers to actually go out and watch it.