"A lot of times, you learn from wardrobe and hair much more about your character than sometimes is even in the script," he says of his guest appearance on Wednesday's episode. "They had already decided on my wardrobe but the hair was up for grabs, and at first I thought (it should be) slicked-back, Bela Lugosi-style hair. The hair person showed me that blonde wig and I remember thinking, “I don’t think that’s really right.” I’m glad I tried it on. Just holding it, it was a mass of white hair. When she put it on and styled it, I thought, 'Oh my gosh, it adds to the gravitas of the character.'"