others must have a better memory for detail?

I don't really rewatch eps often, so I usually can't place when we see what and such, but I know others are awesomely detail oriented when it comes to canon. So, could anyone tell me in which Merlin eps we get the best looks at the throne room? I mean the large, mostly empty hall with the more elaborate throne, iirc, not the smaller hall that we often see with tables. I'd really like some good visual reference for it.