When Game of Thrones ended earlier this year, a video circulated online of Jon Snow apologizing to the show’s fans for the way the last season ended. The video appeared to show the actor Kit Harrington, dressed as Snow, apologizing for his lack of dialogue and the generally dissatisfying final season in a rousing speech. This was not Harrington doing another satirical skit on Saturday Night Live, but instead, a manipulated video where footage from Game of Thrones was altered to make it seem like the actor was saying words he never said. This video is among the latest in a recent spate of “deepfake” videos — viral videos that have been digitally doctored to make it seem like people are saying and doing things that they never actually said or did. The videos are made using artificial intelligence that can map the face of one person onto another, creating highly realistic, but fake, videos.