The unbelievable life story of Doris Duke, who became "the richest girl in the world" at 12 years old.

Watch the full story on "Nightline" tonight at 12:35 a.m. ET. Hamm plays JB Bernstein, the smooth-talking sports agent who created the Million Dollar Arm contest in India.

Million Dollar Arm Jon Hamm makes his bid for movie stardom in a semi-winning baseball drama. by Emma Simmonds Thursday, 28 August 2014. Share. Worlds apart: Jon Hamm finds himself on an emotional ...