- Barry White - It's Only Love Doing Its Thing plays as Watson shows Holmes' bees on-line for Everyone.
- The Stones Roses - This Is the One plays at episode end as Holmes and Watson have set up practice in London.
- The episode title is taken from a famous Conan Doyle Sherlock Holmes quote, "when you have eliminated the impossible, whatever remains, however improbable, must be the truth" which first appeared in The Sign of the Four. Holmes also quotes it in "The Leviathan".
- Lord St. Simon and Hatty Doran are both characters from Conan Doyle's The Adventure of the Noble Bachelor.
- Holmes' phranology bust "Angus" which Watson used to subdue DEA Agent Diaz in "A Giant Gun, Filled with Drugs" is seen behind Holmes at 221B Baker Street.
- "Well then it's over, you know. You know, our little family unit. You, me, the captain, Marcus. We'll never be able to set foot in that precinct ever again."
- ―Holmes to Watson
|Elementary Season Six Episodes|
|An Infinite Capacity for Taking Pains • Once You've Ruled Out God • Pushing Buttons • Our Time Is Up • Bits and Pieces • Give Me the Finger • Sober Companions • Sand Trap • Nobody Lives Forever • The Adventures of Ersatz Sobekneferu • You've Come a Long Way, Baby • Meet Your Maker • Breathe • Through the Fog • How to Get a Head • Uncanny Valley of the Dolls • The Worms Crawl in, the Worms Crawl Out • The Visions of Norman P. Horowitz • The Geek Interpreter • Fit to be Tied • Whatever Remains, However Improbable|
|Season One • Season Two • Season Three • Season Four • Season Five • Season Six • Season Seven|
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