Guest Stars Maximiliano Hernández as Doc Rios Fay Masterson as Andrea Garnett Andy T. Tran as Lt. Andy Chung Mark Moses as President Jeff Michener Brían F. O'Byrne as Sean Chris Marrs as Engineer Lynn Deborah May as President Geller Timothy Landfield as Dr. Julius Hunter Kim Robillard as Senator Erica Giles as Painter