"The Imitation Game," a biopic about a British mathematician and World War Two code-breaker, starring Benedict Cumberbatch and Keira Knightley, opened the BFI London Film Festival on Wednesday (October 8).<br/> <br />In the movie, Cumberbatch plays a brilliant mathematician who breaks the Germans' Enigma code, helping to bring the war to an end.<br/> <br />There is already plenty of awards season buzz around the movie, which won a large round of applause from journalists and critics after its first festival screening, with talk that Cumberbatch's turn as the troubled math genius may win him a best actor Oscar nomination.<br/> <br />SOUNDBITE Benedict Cumberbatch saying (English):<br/> <br />"I am working quite hard at the moment so I am not paying any attention to that. But what's thrilling about any attention on this film or my performance is hopefully it'll bring people to the story."<br/> <br />The pair starred together in the 2007 World War 2 movie, "Atonement."<br/> <br />'The Imitation Game' opens in the UK o