Journalism today has lost a lot of its credibility, so its refreshing to find voices willing to ask the tough questions and bring us back the answers. PBS’s Frontline series of documentary films are comprehensive, objective and informed, and with over 70 films and counting viewable online, you have a huge choice of content. A recent highlight is the timely and topical “The Choice 2008″ which plots the careers of the two candidates in the US election, Messers Obama and McCain.