Dr. Maura Isles (Sasha Alexander) wore this bonded jacquard knit sheath dress with dainty scalloped trim and cutout back in an episode of Rizzoli and Isles.  

It is the Zac Posen Jacquard Sheath Dress.  Buy it HERE for $2,290.

(thanks to rizzoliandislesfashion for the ID)