Bruce Greenwood has joined the cast of Truth, James Vanderbilt’s story of Dan Rather’s fall from grace. The movie stars Robert Redford as Rather and Cate Blanchett as Mary Mapes, Rather’s producer, and is currently shooting in Australia. Vanderbilt wrote the script and is making his directorial debut. Greenwood will play Andrew Heyward, president of CBS News, the man who ultimately fires Mapes.