Court Assassination (殿上の闇討ち) - S1.E4

Tadamori becomes the first samurai granted a title which allows him to enter the Imperial Palace in recognition of his loyalty to the Imperial Court, which brings joy to the Taira clan including Kiyomori. However, some aristocrats are not pleased with Tadamori's promotion, and Fujiwara no Tadazane from a prominent family in the Imperial Court, plots to make a sneak attack on Tadamori by maneuvering Tameyoshi.