Season four of this hit procedural drama about the Missing Persons Squad, a unique New York based FBI task force, is now available! From executive producer Jerry Bruckheimer, Without a Trace stars Anthony LaPaglia, Poppy Montgomery, Marianne Jean-Baptiste, Enrique Murciano, Roselyn Sanchez and Eric Close. As the fourth season begins, Martin has been gravely injured in the line of fire and finds rehabilitation slow. Jack, Samantha and Danny try not to let their concern for Martin hinder their efforts. Vivian's heart surgery appears to have been a success. Plus, rookie Elena Delgado (Sanchez), formerly of the NYPD, has joined the squad after Jack realizes the crisis plagued team needs help. But Delgado still has a great deal to learn. Guest stars this season include Gordon Clapp, Laurie Metcalf, Jason Priestley and recurring guest stars Lynn Whitfield, Martin Landau and Mary Elizabeth Mastrantonio, appearing as FBI agent Anne Cassidy, who butts heads with Jack on more than one occasion.