Cavill stars as monster hunter Geralt of Rivia who wields a mean sword and is handy with a rope. It's based on the writings of Polish author Andrzej Sapkowski (and not the video games it also inspired, according to SyFy.)
In the trailer, we also meet the show's other main characters.: Anya Chalotra as Yennefer, a sorceress and Geralt's lover; and Freya Allan as Ciri, princess of a conquered nation and a potential Witcher herself.
"I'm a big gamer. I’ve played the games a lot,” Cavill told the crowd in Hall H at San Diego Comic-Con today. "There was something about Geralt that struck a chord with me. He’s not your average hero. He’s a hard exterior, real-world type person and at the same time, deep down, he’s a real hero."
Cavill also revealed that he did his own stunts for the series. "It’s very important for me that you know it’s Geralt and it’s not some guy doing Geralt stuff but it’s me in there,” he told the audience before showing a clip of his character cutting through a throng of armored soldiers.
Allan said of her character, "She’s had a very sheltered upbringing and as a result she’s incredibly naive to what the real world is. A huge part of her journey is putting herself in other people’s shoes. It’s clear from the start that she has this might and drive but she has to find a new kind of drive to look past the horrific things she sees. It’s a journey of discovery."
No official release date has yet been announced for the series, only that it's "coming soon."