The Witcher season four teaser. It has been a tumultuous run for Netflix's popular adaptation of The Witcher novels and games. A series of setbacks and controversies led to a long delay after the show lost its star, Henry Cavill. Now a brief season four teaser gives us our first look at Cavill's replacement in the role of Geralt of Rivia, Liam Hemsworth. The video above reveals little about the direction for the season beyond establishing that, yes, Hemsworth is now Geralt, and here's what it looks like.