S01E10-Gwen and Olivia

Gwen and Olivia Lynch Elementary intertitle Paramours

Character Information
Status: Alive
Actor: Tonya Glanz
First Appearance: "The Leviathan"
Episode Count: 1
I think I just met your sister.
— Watson, "The Leviathan".

Gwen and Olivia Lynch are identical twin sisters living in New York City.


Season One

They have a semi-frequent sexual relationship with Sherlock Holmes, who describes their interaction as "mutually beneficial". Their contact allows him to study the differences between two people who are otherwise genetically identical (according to him, there are seven major differences between the Lynch Sisters). As to what they get in return, Joan Watson cut him off before he could explain, but both sisters bid a fond farewell to Sherlock when they departed The Brownstone after their last rendezvous. ("The Leviathan")


  • Gwen and Olivia are actually played by a single actress, Tonya Glanz.
  • Gwen is wearing Holmes' t-shirt that he was wearing when he first met Watson.
  • According to Sherlock Holmes, there are seven major physiological differences between the Lynch sisters, despite their being genetically identical. One noticeable difference is that Gwen wears glasses.

Elementary intertitle Elementary Characters
Main Characters
Sherlock HolmesJoan WatsonCaptain Thomas GregsonDetective Marcus Bell
Recurring Characters
AlistairAthena and MinervaJonathan BloomRoy BookerAgent BurkeClydeGina CortesFrank Da SilvaDuaneEveryoneAgent GephardtDr. GrannisChristopher GrayDel GrunerHalconEmily HankinsDr. Eugene HawesFiona HelbronWilliam HullShinwell JohnsonEmil KurtzGareth LestradeAlfredo LlamosaMarchefElana MarchDean McNallyChantal MilnerAndrew MittalSanthosh MittalSebastian MoranJamie MoriartyAgent MullerRandyOscar RankinCandace ReedMichael RowanTim SherringtonTall BoyJoshua ViknerSir James WalterAgent WhitlockTyus WilcoxKitty Winter
The Irregulars
Mr. BriggsC.Harland EmpleGayMs. HudsonLucMasonThe NosePhil SimmsAgatha SpurrellTeddy
Paige CowanHannah GregsonMay HolmesMorland HolmesMycroft HolmesEstella LlamosaHenry WatsonMary WatsonOren WatsonLin Wen
Minor Characters
CassieLucas BundschHoward EnnisMistress FeliciaZoya HashemiRuslan KrasnovGwen and Olivia LynchNigella MasonTy MorstanRemusRomulusJennifer SaylesShauna ScottHenry Watson