David Bradley
David Bradley isn't worried after playing Walder Frey, one of the most despicable characters on Game of Thrones.

"I'm not exactly watching my back," the actor said at the Television Critics Association fall previews for BBC America on Thursday. Frey played host to the Red Wedding, the moniker for the infamous massacre of Northmen, including three main characters, in the penultimate episode of Game of Thrones' bloody third season.

Game of Thrones shocker: Cast spills about Red Wedding shocker

"There's a twinkle when they admonish me," he said. I was watching reactions on YouTube of people watching it. ... It's amazing that you are part of something that can generate all of those emotions. ... Doing the scene, I enjoyed every moment of it. I enjoyed it rather too much actually."

In a way, Bradley identifies with Frey, who watched the bloodshed while laughing and drinking wine. "He's fun because he's irredeemable. He's a consummate actor, like Shakespeare's Richard III -- he's a great actor and relishes the villainy and shares that with the audience. I feel there's something of that in Walder Frey."

In BBC America's An Adventure in Space and Time, Bradley plays William Hartnell, the actor who played the first incarnation of the Doctor on Doctor Who. The film details the origins of the famous sci-fi series, which celebrates its 50th anniversary inNovember.

Bradley admires Hartnell's talents and appreciates that the film "brought out the complex nature in the man" who was hesitant to initially sign on for what was meant to be a children's show. "He was absolutely delightful, but he had his funny days," Bradley observed. "It's a pretty accurate portrayal... and doesn't try to sentimentalize his life."

An Adventure in Space and Time
premieres in November on BBC America.