Everyday heroes who had the courage to jeopardize their lives by revealing hidden injustices to the public eye... whether men or women, fictional or real, triumphant or tragic, here is a list of ten memorable movie whistleblowers's performances that earned an Oscar nomination in a Leading Category. From these 10 Oscar-nominated characters who 'knew too much', which one do you consider the most admirable? Discuss here In bold, what they denounced.