With Gwen, Rex and Esther trapped on both sides of the Atlantic, it's a race against time as Jack goes straight to the heart of the conspiracy.

Cast: John Barrowman, Eve Myles, Mekhi Phifer, Alexa Havins, Lauren Ambrose, Kai Owen, Bill Pullman, Arlene Tur, Jonathan Spencer, Frederick Koehler, Jason Brooks, Tom Price, Marc Vann, William Thomas, Ciera Payton