Two-time Tony Award winner John Lithgow is back on Broadway in Giant, a new play exploring the darker side of celebrated children's author Roald Dahl. Lithgow reprises his Olivier Award-winning performance as Dahl and visited The Late Show with Stephen Colbert to talk all about it. "Lots of people know Roald Dahl's writing. You know he has his dark side as a writer. Well, he had his dark side as a human being," Li…
