Channel 2 (Spectrum) and 12 (Hawaiian Telcom) (Subject to change, without notice. For updated information, call 521–8066.) “Dream of the Emperor,” Saturday and Sunday at 9:30 p.m.; re-airs Saturday and Sunday at 1:15 p.m. This historical drama captures the rise of Shilla, one of Korea’s Three Kingdoms, through the story of future King Taejong Muyeol,…