Food Wars! Shokugeki no Soma S01 E16 The Cook Who Traveled Thousands of Miles

When Soma's father, Joichiro, suddenly shows up on Polar Star Dormitory's doorstep, Soma finds out that his father was an alum of Totsuki Academy and Polar Star Dormitory. Joichiro challenges Soma to a cooking duel to find out how far his son has come. How will the family duel end?