Twice has Sidney Poitier played a character with the last name of Younger. As Walter Younger in "A Raisin in the Sun"; and Dr. Matt Younger in "Warm December."
Dr. Matt Younger:
Blowing people's minds must be your hobby.
Dr. Myomo has two scars, one on each cheek throughout the movie. He is identified by Dr. Young as the man "with the scars" when talking with Cathrine. But in his last scene with Dr. Young his scars are missing.