Nathan Fillion will join the cast of “Lemony Snicket’s A Series of Unfortunate Events” in Season 2, TheWrap has learned exclusively. The “Castle” alum will play Snicket’s brother, while Tony Hale, Sara Rue, Lucy Punch, and Roger Bart have also joined the Season 2 cast. The show’s producers are expected to announce the new cast additions at a discussion about Season 1