HBO has given the green light to the miniseries "Lewis and Clark" which Edward Norton, Brad Pitt, Tom Hanks, Dede Gardner and Gary Goetzman will executive produce for HBO, National Geographic Entertainment, Playtone, Plan B and Class 5. Casey Affleck and Matthias Schoenaerts will star as Meriwether Lewis and William Clark, respectively, in this six-hour historical drama based on Stephen E.