Gina Gershon Gina Gershon

Joan Watson, meet your match!

Gina Gershon has landed a guest-starring role on Elementary, has learned exclusively.

The Bound star will play Elana March, a socialite whom Joan (Lucy Liu) suspects of running a notorious drug cartel. Unable to prove Elana's ties to the cartel's operations, Joan hopes to turn one of Elana's accountants into a key witness for the prosecution. But Joan's pursuit of Elana quickly becomes personal, with Elana demonstrating the lengths to which she's willing to go in order to avoid prison.

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Gershon, whose TV credits include Rescue Me and Community, is slated to appear in the Season 3 premiere, which airs Thursday, Oct. 30 at 10/9c on CBS.

(Full disclosure: is owned by CBS.)

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