Matthew Gray Gubler, known for his role as Dr. Spencer Reid on "Criminal Minds," tells AM to DM about his new children's book "Rumple Buttercup: A Story of Bananas, Belonging and Being Yourself" — while dressed as the banana-hatted character. With "Criminal Minds" ending after 15 seasons, Matthew reflects on portraying a character for so long and plays the BuzzFeed Quiz "Can You Guess The Season Of 'Criminal Minds' Based On Spencer Reid's Hair?"