two episodes, and Andy Wilson directed the last two episodes. Sue Gibson and Sean Bobbitt served as the directors of photography, with Mark Goddard and Francesco Reidy serving as first assistant directors. Colin Green and Soren B. Ebbe were the series editors, while David Crozier and Andrew Sissions served as sound recordists. Leila Kirkpatrick was the line producer and Linda Stefansdottir was the production designer, while Andrea Galer was the costume designer, and Alison Davies was the make-up designer. The casting director for the first series was Gail Stevens. Karen Wilson was the script editor, and Ralph Cameron and Malcolm Treen were the location managers. Conception Kudos began to develop the show after producing the Channel 4 medical drama series Psychos in 1999. Kudos wished to explore series ideas that saw beyond typical "precinct-based dramas" (crime and medical). Stephen Garrett decided on developing a spy drama after coming across John le Carré novels at a Waterstone's bookstore, and came to realise that MI5 or MI6 had not been featured as the setting for shows before. He felt the benefit of a spy show is that rather than in a crime drama where the protagonists take their work home with them, spies are given the added dimension that they cannot reveal their work even to their loved ones. In the meantime, Wolstencroft, who wrote Psychos, was also developing a spy drama, albeit as a film. When Kudos contacted him, they agreed they should work together to create a television series based on his idea, which was not to glamourise the world of spies, instead showing the audience that spies work in a "shitty job". Kudos later pitched the show to all the major British television networks; however none of them were as enthusiastic as Kudos, as they did not see the potential of a post-Cold War spy series. After the commissioning teams from the networks were replaced, Kudos again pitched the show, albeit reinvented, and as a result Lorraine Heggessey, controller of BBC One, commissioned the show after planning to introduce "braver", "dynamic" and "pacier" shows to attract a younger audience for the channel. Writing The two main writers, Brenton and Wolstencroft, had different styles and influences in their scripts. Wolstencroft was influenced by American television to make the episodes pacier. His chosen writing style was a mixture of the "grittyness" of le Carré's works and James Bond-like fantasies. While writing