Release Message:  Gary (Kyle Chandler) uncovers an assassination plot is in the works, and he is at the center of it.

Description:  The discovery of an envelope hidden in a wall, left there by Lucius Snow, coincides with a visit of the U.S. President to Chicago. Gary uncovers an assassination plot is in the works, and he is at the center of it. The envelope left by Snow reveals that Snow faced a similar situation in 1963. Colleagues are not safe as part 1 of "The Wall" plays out.