rimeval is a British science fiction drama 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 scientists tasked with investigating the appearance of temporal anomalies across Great Britain through which prehistoric and futuristic creatures enter the present, as well as trying to prevent end-of-the-world scenarios from occurring.
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% audience share in the United Kingdom during both series to date. Before it was broadcast on 9 August 2008 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. In the US, series 3 premiered on 16 May 2009 on BBC America.
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.Overview from themoviedb.org