Sam Worthington's name is synonymous with Avatar, and after having recently done another action flick (Clash of the Titans), he hasn't really proved himself as a dramatic actor. That could all change with his film The Debt, a thriller half set in present day and half in flashback. Worthington plays David, one of three Israeli Mossad agents in the flashback period who have been sent to hunt a Nazi war criminal. The real evidence that Worthington is amping up his acting resume is the support here: his costars are Helen Mirren and Tom Wilkinson, and the director is John Madden, of Shakespeare in Love.The subject matter is understandably intense, and the trailer offers equal parts heart-pounding sequences and emotional heft. I can't wait to see if Worthington can hold his own — or if he's drowned out by the rest of the cast. Watch the preview and form your own opinion when you read more.