10 HD is an Australian free-to-air television channel that was originally launched on 16 December 2007 on channel 1. The channel was available to high definition digital television viewers through Network 10 owned-and-operated stations. The multichannel broadcast live sport, entertainment, films, documentaries, science fiction and news. The channel ceased broadcasting on 25 March 2009, and the following day was replaced by One HD (now known as 10 Bold).