Guest Stars Jarod Joseph as Nathan Miller Sachin Sahel as Eric Jackson Alycia Debnam-Carey as Lexa Erica Cerra as Alie Katie Stuart as Zoe Monroe Michael Beach as Charles Pike Jonathan Whitesell as Bryan Toby Levins as Carl Emerson Donna Yamamoto as Hannah Green Neil Sandilands as Titus Shaine Jones as Shawn Gillmer Zak Santiago as Semet Co Starring Christian Sloan as Ambassador Uzac Marilyn Norry as Enera Michael Strusievici as Gavriel Uncredited Hedi Rian as Healthy Grounder