The official ThunderCats facebook profile has been updated with three new preview images of the upcoming episode "The Book of Omens", seen above. There's lots to find out with this episode: Who is Lion-O's mysterious ancestor, and what's his relationship to Mumm-Ra? Finally, what's the story of the stones and why does Mumm-Ra want them so bad? Find out the answers to these questions and more as Lion-O journeys into the Book of Omens on an all new ThunderCats, September 2nd, 2011 at 8:30 EST on Cartoon Network!
