There are 6 episodes in Series 1 of The Office (UK). The BBC sitcom premiered in July 2001 and followed the employees of the Slough branch of the fictional paper company Wernham Hogg. Its first series established David Brent, Tim Canterbury, Dawn Tinsley and Gareth Keenan, along with the mockumentary style that became the show's trademark.
The six episodes are titled "Downsize", "Work Experience", "The Quiz", "Training", "下?" No—the official sequence is "Downsize", "Work Experience", "The Quiz", "Training", "The New Girl" and "Judgement". The series finale deals with David's promotion dilemma and Tim's decision about whether to leave Wernham Hogg.
A common mix-up is counting the Christmas specials with Series 1 or Series 2. The programme has 14 episodes in total: six in each regular series and two Christmas-special episodes. The American adaptation used much longer seasons, so its episode structure can make the British original seem larger than it was.