Mary McCormack stars as Mary Shannon, a U.S. Marshal working in the highly secretive branch of the witness protection program (WITSEC) who relocates Federal Witnesses - many of them career criminals, and many who are innocents that had the misfortune of witnessing a crime. They all have one thing in common - someone wants them dead. Mary's job is to see that doesn't happen, while at the same time attempting to manage her own dysfunctional family. "In Plain Sight" also stars Frederick Weller, Lesley Ann Warren, Nichole Hiltz, Paul Ben-Victor, Cristian de la Fuente and Todd Williams. Holly Maples ("The Office") joins the cast this season as Eleanor, the new administrative assistant, along with Joshua Malina ("The West Wing") as Peter, an alcoholic in recovery whom Brandi meets at an AA meeting and Laura Prepon ("That 70’s Show," "October Road") as Lauren, a woman connected to Mary in an unexpected way.