Fillion is on board to play a character by the name of Jacques Snicket, who is the younger brother of Lemony Snicket (played by Patrick Warburton) and the former classmate of Count Olaf (Harris).
Nathan Fillion’s scenes with Neil Patrick Harris in A Series of Unfortunate Events will certainly be quite different from their scenes together in Dr. Horrible’s Sing-A-Long Blog, although I know I wouldn’t object if they broke into song at some point.
Something tells me Count Olaf won’t have any thoughts on freeze rays vs. ice beams, and Jacques Snicket might not combine threats with lacy, gently wafting curtains.