the first episode of Sherlock to be produced after the BBC accepted the series. The series was filmed in reverse order because co-creator Steven Moffat, the writer of the first episode "A Study in Pink", was busy with the fifth series of Doctor Who. Andrew Scott made his first appearance as Jim Moriarty in "The Great Game". Moffat said, "We knew what we wanted to do with Moriarty from the very beginning. Moriarty is usually a rather dull, rather posh villain so we thought someone who was genuinely properly frightening. Someone who's an absolute psycho." Moffat and Gatiss were originally not going to put a confrontation between Moriarty and Sherlock into the first three episodes, but realised that they "just had to do a confrontation scene. We had to do a version of the scene in 'The Final Problem' in which the two arch-enemies meet each other." Sherlock's residence at 221B Baker Street was filmed at 185 North Gower Street. Baker Street was impractical because of heavy traffic and the number of things labelled "Sherlock Holmes", which would need to be disguised. The laboratory used by Sherlock was filmed at Cardiff University School of Earth and Ocean Sciences. "The Great Game" was partly set in a disused sewage works. Broadcast and reception "The Great Game" was first broadcast on BBC One on 8 August 2010. Overnight figures had been watched by 7.34 million viewers on BBC One and BBC HD, a 31.3% audience share. Final viewing figures rose to 9.18 million. Critical reception was highly positive. Chris Tilly of IGN rated "The Great Game" a 9.5 out of 10, describing it as "gripping from start to finish". Of Moriarty's appearance, he said it "didn't disappoint either, the villain of the piece being unlike any incarnation of the character yet seen on screen". He also praised the writing, saying, "Credit should go to writer Mark Gatiss, his script the perfect combination of classic Conan Doyle storytelling with modern-day plot devices and humour, creating a sophisticated mystery that was the perfect marriage of old and new.", and the performances of Cumberbatch and Freeman. John Teti, writing for The A.V. Club, awarded the episode an A- and called it an "extraordinarily dense 90 minutes". He further singled out Andrew Scott for praise, writing that his "portrayal of Moriarty is a thrilling departure from earlier incarnations of the man". The Guardian Sam Wollaston was