Aaron investigates an explosion on Ascension, while Captain Denninger covers up its true cause. Elsewhere, Viondra suspects there is a traitor within her ranks of stewardesses after Councilman Rose becomes privy to inside information; something mysterious seems to be happening to young Christa Valis; and James Toback attempts to impress Nora by making a deal to get into Officers Training School.
Elenco: Tricia Helfer , Brian Van Holt , Al Sapienza , Brad Carter , Jessica Sipos , Michelle Mylett , Ellie O'Brien , Andrea Roth , Brandon P. Bell , Gil Bellows , Ryan Robbins , Tiffany Lonsdale .