It's a race against time as Darius must accelerate his plan to stop the asteroid before the Pentagon shuts him down. Also, Grace has to make difficult decisions that could have life or death consequences for millions of people, and Liam and Jillian r... (more)eunite under surprising circumstances.

Aaron Poole, André Dae Kim, Chattrisse Dolabaille, Dennis Boutsikaris, Derek Webster, Erica Luttrell, Josette Jorge, Warren Belle