The Staircase is a miniseries based on the real-life murder mystery surrounding a writer whose wife was murdered in their home. Colin Firth plays Michael Peterson, the husband accused (and — spoiler alert — convicted) of killing his wife. The Academy Award winner acknowledged that he’s never really encountered a character like this in his professional life, and he told us how he was able to find his way into the character’s headspace. (Click on the media bar below to hear Colin Firth)