The United States version is produced by Mark Burnett and hosted by Jeff Probst. It is shown on Thursdays on CBS. The first season of Survivor was broadcast as a summer replacement show in 2000. Since then the show has been broadcast each U.S. television season. Each competition is called a season, but each season has a different name, and lasts from 13 to 15 episodes. Starting with "" there have been two Survivor seasons shown during each U.S. television season.