Who Do You Think You Are? is a British genealogy documentary series that has aired on the BBC since 2004, in which celebrity participants trace their family history. It is made by the production company Wall to Wall. The programme has regularly attracted an audience of more than 6 million viewers. More than ten international adaptations of the programme have been produced. Episodes The first two series were broadcast on BBC Two and the first was the channel's highest-rating programme of 2004. This led to episodes being shown on BBC One from the third series onwards. The current narrator, as of Series 14 in 2017, is Phil Davis. Mark Strong took over from David Morrissey after the first series, which was nominated for "Best Factual Series or Strand" in the 2005 BAFTAs. Cherie Lunghi was the narrator between Series 10 and 13. In the first series, the last ten minutes of each episode featured presenter Adrian Chiles and genealogical researcher Nick Barratt giving tips on tracing a family tree. In 2007, a special episode was broadcast in conjunction with the BBC's "Family Wanted" campaign featuring Nicky Campbell, who was adopted when he was just a few days old. The theme tune was composed by Mark Sayer-Wade, who also provided the background music for earlier episodes. The music in later episodes is provided by Julian Hamlin and Edmund Jolliffe. Other countries The TV format of the series has proved popular around the world and the BBC has licensed it to many foreign television companies who have produced their own individual versions. TVP1 has aired a Polish version, called , which was broadcast from November 2006 to March 2007. In September 2007, a series of a Canadian version, consisting of 13 episodes, aired on CBC Television. In 2015, Radio-Canada produced a French-language version called An Australian version aired on SBS in January 2008 after six episodes of the BBC version had been shown. The BBC programmes were those featuring Stephen Fry, Bill Oddie, Julia Sawalha, Jeremy Clarkson, Gurinder Chadha and Nigella Lawson. In 2008, ARD's Das Erste aired the German version, called ("The secret of my family"). They aired four episodes featuring Marie-Luise Marjan, Armin Rohde, Christine Neubauer and Peter Maffay. Ireland's national broadcaster RTÉ has aired three series of Irish version of Who Do You Think You Are? in autumn 2008, 2009 and, after a considerable gap, 2018. The Irish version