Broadcast television is facing significant changes as the internet and interactive media compete for audiences and revenues, though TV is still very popular with the average British viewer watching 20 hours per week. Some notable actors in the TV industry include Seth McFarlane, who created the hit show Family Guy, and Trey Parker and Matt Stone, who create and voice all the characters on South Park. Comedy Central is a public entertainment cable network founded in 1989 by Viacom Media Networks, known for shows like South Park and Two and a Half Men.