Primeval is a British science fiction television programme produced for ITV by Impossible Pictures. Created by Adrian Hodges and Tim Haines, who previously created the Walking with... documentary series. Primeval follows a team of five scientists tasked with investigating the appearance of temporal anomalies across Great Britain through which prehistoric and futuristic creatures enter the present. First broadcast in the UK on 10 February 2007, it has since expanded to an international audience. Overall reception of the programme was positive during the first and second series, maintaining a 25 percent audience share in the United Kingdom during both series to date. Prior to its 9 August 2008 broadcast on BBC America, the programme received generally positive reaction from American critics as well. The third series, which ITV announced on 30 January 2008, began on 28 March 2009 and has now finished. In the US, series 3 premiered on 16 May 2009 on BBC America and has finished airing. On 29 September 2009, it was announced that a deal had been struck between ITV, BBC Worldwide, Watch, Impossible Pictures and the German broadcaster ProSieben to produce two new series of the show for transmission in 2011.[1] The fourth series started airing on New Year's Day 2011 on ITV(ITV1/STV/UTV) in the UK and on BBC America in the US.[2] The fifth series will have 6 episodes and will air on Watch in May 2011 and on ITV1 later in 2011