After seeing this pilot, the BBC decided they wanted episodes of the series to be 90 minutes long instead of the planned 60. This episode was rewritten, expanded, and re-shot, resulting in the episode A Study in Pink (2010).
This episode never aired on TV. It was included as an "extra" when Series 1 was released on DVD and Blu-ray in 2010.
Speedy's Cafe, seen next to 221B Baker Street, was originally Mrs. Hudson's Snax n' Sarnies. The idea was disbanded when the pilot was reshot.
Sherlock has a disciplined diet that allows him to go for at least two days without a meal.