 Rupert Graves was cast as DI Greg Lestrade. The writers referred to the character as "Inspector Lestrade" during development until Gatiss realised that in contemporary England the character would have the title "Detective Inspector". Moffat and Gatiss pointed out that Lestrade does not appear often in the stories and is quite inconsistently portrayed in them. They decided to go with the version that appeared in "The Six Napoleons": a man who is frustrated by Holmes but admires him, and whom Holmes considers as the best person at Scotland Yard. Several candidates took a comedic tack in their auditions, but the creative team preferred the gravitas that Graves brought to the role. His first name is revealed to be Greg in "The Hounds of Baskerville".
