Bill Nighy is to reprise his role as Johnny Worricker.

The 'Love Actually' star will return to the part of the MI5 spy in 'Turks & Caicos' and 'Salting The Battlefield', the final two parts of 'The Worricker Trilogy' on BBC Two, alongside a string of famous names.

'Turks & Caicos' will also star Christopher Walken, Winona Ryder, Helena Bonham Carter, Ralph Fiennes, Ewen Bremner, James Naughton, Dylan Baker, Zach Grenier and sees Bill's character having walked out of MI5 and heading out to a random destination. However, his presence on the Turks & Caicos islands lead him to be forced by the CIA to deal with an "ambiguous" group of Americans who are attending a conference on the global financial crisis. At the same time, Margot Tyrrell, an old girlfriend of his is asked to betray her London boss in order to establish an illicit connection between the prime minister and dark goings-on in the war on terror.

Meanwhile, Helena, Ralph and Ewen will also star in the third film, along with Saskia Reeves, Judy Davis, Kate Burdette and Malcolm Sinclair.

'Salting the Battlefield' sees Johnny and Margot on the run across Europe and battling with the difficulties of life in exile, prompting the former spy to realise he needs to return home to confront Prime Minister Alec Beasley.

Writer and director David Hare said: "We have assembled a most extraordinary cast for these two films. I think there may be two reasons - first and foremost, because so many actors want to appear alongside Bill Nighy, but secondly, because people responded so strongly to the feeling of 'Page Eight' - all the fun of spy fiction, I hope, but, for once, bang up to date and based in the real intelligence dilemmas of the last 10 years."

Janice Hadlow, Controller of BBC Two, added: "David Hare's outstanding films and incredible cast are testament to BBC Two's commitment to original British drama and I am delighted to welcome him back to the channel."