Gina Gershon cast in Elementary 

Gershon will play Joan Watson\'s rival in season three of the modern-day Sherlock Holmes series,

Her character Elana March is a socialite suspected of running a drug cartel, but when Joan (Lucy Liu) sets out to prove March\'s guilt, the case quickly becomes personal.

\'s third season premiere, airing Thursday, October 30 at 10/9c on CBS.

Best known for her film work, the 52-year-old actress has featured in a string of cult \'90s movies, including

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