Merlin is a British fantasy-adventure television programme by Julian Jones, Jake Michie, Julian Murphy and Johnny Capps. It began broadcasting on BBC One on 20 September 2008. The show is based on the Arthurian legends of the wizard Merlin and his relationship with Prince Arthur but differs from traditional versions of the legend in many ways. It is produced by independent production company Shine Limited. After a successful first series, U.S. broadcaster NBC began airing the programme on 21 June 2009, but after a decline in viewers, it was moved to the cable network Syfy, where it began broadcasting the second series on 2 April 2010. The second series began airing on 19 September 2009 on BBC One. On 5 September 2010, BFI Southbank in London previewed the first two episodes of the third series for its September Film Funday programme.