CBS | 9:00 pm

Grace’s (Jennifer Finnigan) world could end sooner than the larger one, since she becomes a target as an assassin places her in the crosshairs in the new episode "Patriot Games." With the crisis facing Earth advancing, Darius and Liam (Santiago Cabrera, Charlie Rowe) each seek unlikely assistance in their plans to save mankind. Ian Anthony Dale, Jacqueline Byers and Rachel Drance also star.