Because it was aired on HBO, a premium cable television channel, it was allowed to have full freedom from censorship by network standards and practices. As a result, HBO allowed the series to include content that had not appeared in most television series up to that time, such as graphic violence, profanity, sexual activity, and nudity. The series is subsequently edited for such content when broadcast in syndication or on basic cable. While the series began production in the United States, in the final season filming moved to the United Kingdom, resulting in episodes which revolved around British characters.