Benedict Cumberbatch, up for an Oscar this month for playing a very smart man who deals with secrets, plays another in this 2013 movie. He plays Julian Assange, the controversial founder of WikiLeaks. And Cumberbatch, who also plays the title role in TV’s Sherlock, isn’t the only high-profile British TV star in this docudrama: Another is Peter Capaldi, now the latest actor to portray the titular role in Doctor Who.