- Daniel Powter - Bad Day is Holmes' and Watson's ringtone for Lestrade.
- The Dodos - Confidence plays at episode end as Lestrade gloats to Watson.
- Holmes uses a mug shot of Alphonse Bertillon to explain to Bertillon's contributions to criminology to Watson including inventing mug shots. Bertillon is also mentioned in Conan Doyle's The Hound of the Baskervilles.
|Elementary Season Two Episodes|
|Step Nine • Solve for X • We Are Everyone • Poison Pen • Ancient History • An Unnatural Arrangement • The Marchioness • Blood Is Thicker • On the Line • Tremors • Internal Audit • The Diabolical Kind • All in the Family • Dead Clade Walking • Corpse de Ballet • The One Percent Solution • Ears to You • The Hound of the Cancer Cells • The Many Mouths of Aaron Colville • No Lack of Void • The Man With the Twisted Lip • Paint It Black • Art in the Blood • The Grand Experiment|
|Season One • Season Two • Season Three • Season Four • Season Five • Season Six • Season Seven|