The title of the new episode is "Black Helicopters," and it will pick up where episode 12 left off. Patrick Jane (Simon Baker) will be in grave danger and we are all going to find out what The Blake Association is planning to do against Jane, Lisbon (Robin Tunney) and their associates. Mentalist creator Bruno Heller hinted that the upcoming episode is going focus on the "Blake villains." 

http://www.travelerstoday.com/articles/8363/20140126/why-cbs-airing-mentalist-season-6-episode-13-tonight.htm