Sam Worthington and Jessica Chastain talk to MTV News about challenges and rewards of playing special agents in John Madden film. By Kara Warner Sam Worthington in “The Debt” Photo: Focus Features Even at a glance, John Madden’s new movie “The Debt” has a lot going for it: a cool-looking espionage thriller that boasts a stellar cast, including breakout stars Sam Worthington (“Avatar”) and Jessica Chastain (“The Help” and “Tree of Life”), as well as acclaimed actors Helen Mirren, Tom Wilkinson and Ciar
