Jonny Lee Miller and Laura Benanti Jonny Lee Miller and Laura Benanti

Life goes on for Laura Benanti, who's bounced back from the cancellation of her NBC sitcom Go On (and her NBC drama The Playboy Club before that). In addition to her recurring roles as Danny Pino's estranged wife on NBC's Law & Order: Special Victims Unit and Mark Feuerstein's hospital colleague on USA's Royal Pains — not to mention the Tony winner's upcoming turn as the Baroness in NBC's live production of The Sound of Music — she's landed a guest-starring gig on CBS' Elementary.

Benanti will play Abigail Spencer (no relation to the Rectify actress of the same name), a nanny whose CEO boss is found dead while wearing S&M gear in the Oct. 17 episode, "Poison Pen." When Sherlock Holmes (Jonny Lee Miller) and Joan Watson (Lucy Liu) discover the victim was poisoned, the caregiver — who shares a past connection with the master sleuth — becomes the prime suspect.

"She's someone who Sherlock sort of knew as a teenager," reports Miller, who previously worked with Benanti on ABC's short-lived musical dramedy Eli Stone. "I can't really tell you anything more than that." Sounds... mysterious!

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