VIDEO: Sneak Peek - Laura Benanti Guests on Next ELEMENTARY on CBS

On the next episode of CBS's ELEMENTARY titled "Poison Pen", when the CEO of a financial consulting company is poisoned to death, Holmes and Watson are called upon to track down the killer. Meanwhile, a woman from Sherlock's past emerges as a possible suspect.

The episode airs Thursday, October 17th on CBS. Laura Benanti guest stars. Get a sneak peek below!

ELEMENTARY stars Jonny Lee Miller as detective Sherlock Holmes and Lucy Liu as Dr. Joan Watson in a modern-day drama about a crime-solving duo that cracks the NYPD's most impossible cases. Following his fall from grace in London and a stint in rehab, eccentric Sherlock escaped to Manhattan where his wealthy father forced him to live with his worst nightmare – a sober companion, Dr. Watson.  A successful surgeon until she lost a patient and her license three years earlier, Watson viewed her new job as another opportunity to help people, as well as paying a penance.