An interesting take on the over-done topic of anthrax. It was lovely to have a small lead turn into something much larger and then back into something smaller but still significant. The Alistair storyline was also incredible - it isn't very often you get a character like Sherlock doing something rash, something out of emotion like a common person, and then openly admitting that was what happened and that they regret it. It was refreshing. I thoroughly enjoyed this episode.
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