Hair Color  According to the character box Smithers hair color is blue in ONE episode The image and section on Black Smithers show that he was black and had blue hair in Homers Odyssey However I recently saw Theres No Disgrace Like Home In this episode his hair is blue as well  and this clearly comes after Homers Odyssey as proven both by the episode list and the fact Smithers is not black here So to the best of my knowledge Smithers hair is blue in the first TWO episodes