Elementary - Season 3 - Sonya Walger and Zak Orth to Guest - best f y

Lost alum Sonya Walger and Revolution's Zak Orth have landed guest-starring roles on Elementary, TVGuide.com has learned exclusively.

Walger will play Angela White, an Assistant U.S. Attorney whose high-profile case is derailed when her defendant is murdered.

Meanwhile, Orth will play Gabe Coleman, a distraught father whose family was torn apart by tragedy. While Sherlock and Joan suspect Gabe may be connected to a pair of murders, his actual involvement -- and motives -- turn out to be more complicated than first believed.