Sherlock Holmes: A Game of Shadows (2011) on Netflix

Sherlock Holmes is investigating terrorist attacks in London alone since his old partner Dr. John Watson will get married a few days later with Mary. His investigations point to Professor James Moriarty as the person responsible for the explosions. When Dr. Watson and Mary are attacked in the train while traveling for their honeymoon in Brighton, Holmes delivers Mary to the protection of his brother Mycroft. Soon Holmes and Dr. Watson disclose that Professor Moriarty has bought arms and ammunition factories and is trying to start a war in Europe killing political leaders and politicians. Now Sherlock and Watson have to stop Moriarty and his dangerous associate, the skilled former Colonel Sebastian Moran to avoid the imminent war.