Season 4 of IN PLAIN SIGHT which premieres on Sunday, May 1st at 10/9C, as announced by USA Network, stars Mary McCormack as Mary Shannon, a U.S. Marshal working in the highly secretive branch of the witness protection program (WITSEC), who relocates Federal Witnesses, most of whom fall into three categories: career criminals, whistle-blowers or innocents who 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, Nichole Hiltz and Paul Ben-Victor. Besides John de Lancie, the guest stars for season 4 are Josh Malina, Bradley Whitford, Rachel Boston, and Ali Marsh, among others.