Series 4 spoilers in the interview: Anthony talks about what Uther will be doing a lot of in series 4, the Uther-Gaius relationship, filming in 35mm, and seeing or not seeing his Buffy co-stars. The two parts are in a YouTube playlist below.
Direct link to playlist Plus some photos of Anthony at SDCC from
mikethefanboy.com (with watermarks at the bottom) with this description from their
post: "BBC/Syfy’s Merlin also came back this year to weave more magic. There was a snafu on getting the posters up to the signing so those of us at the head of the line had extra time to take some pictures. Can I just say that Anthony Stewart Head is very expressive?"