Syfy says it has ordered a 13-episode fourth season of its hit Boston-set drama series "Being Human." The announcement was made Wednesday by Mark Stern, Syfy's president of original content and co-head of original content for Universal Cable Productions. Starring Sam Witwer, Meaghan Rath, Sam Huntington and Kristen Hager, the supernatural show's Season 3 finale aired Monday. "'Being Human' really hit its stride creatively this year," said Stern in a statement. "This show has become a signature series for Syfy and we are thrilled to have it return in 2014." The show is about a vampire, ghost and werewolf who are roommates.