ONCE Upon A TIME, Season 5 –-SERIES--(NR)--Sometimes it’s Good to be Evil! Darkness and Light. One conceals, the other reveals, but each is infinitely seductive. When the Savior becomes the “Dark Swan”, the lines between good and evil blur as Emma begins to relish the intoxicating taste of absolute power. Terrified she’ll succumb, Emma and Hook visit Camelot to find the one person who may be able to aid them: Merlin! Prepare for the ultimate battle between these epic-opposing forces. Darkness and Light.