Elementary. Episode 15: "A Giant Gun, Filled With Drugs"

CBS via DCT

Although not written by Robert Doherty, this episode makes several canonical references. One is the part about Sherlock Holmes being able to identify a cigarette brand based on the ashes it leaves. Of course you’d know that if you bothered to read his monograph on the subject.

CBS

"I can tell someone's zodiac sign
by the length of his index finger."

Another literary reference: Sherlock’s drug use, which he does to induce him to a presumably altered state, which in turn gives him the out-of-the-box ideas he needs to solve his cases. John Hannah’s presence has tested Sherlock’s self-control as well as their friendship, and Holmes did a great job coming out on top.

CBS

"You know what, Hannah? The Mummy Returns sucked!"

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