If you’re interested to learn more about how they make Game of Thrones, check out this new blog post by Cat Taylor, which details the filming of the first three episodes of season 3!

In a lengthy blog post on Making Game of Thrones, Taylor highlights some of the big scenes filmed for the three episodes of the season we’ve seen so far.

Among other things, she talks about the scene introducing Dame Diana Rigg as Lady Olenna. She writes:

Season 3 introduces us to several new and important characters and I don’t mind admitting that one of my favourites is Lady Olenna, played by the incomparable Diana Rigg. There was palpable excitement in the office on the day she was confirmed, and more than a few extra people came to set on her first filming day.

She also talks about a very special musical guest you might have missed:

Did you spot someone in a cameo? The soldier singing lead in “The Bear and Maiden Fair” is local boy Gary Lightbody, of Snow Patrol fame. He taught the song to the extras before they rode down the track, a song that we’ll certainly hear again. If you were wondering, Jamie and Brienne really were riding back to back on a single horse—the dismounting was something of a process.

Some really interesting stuff for the fans also interested in the technical aspect of creating a TV show! Read the full post here for all the details.

Game of Thrones 3×04 “And Now His Watch is Ended” airs Sunday at 9/8c on HBO.