EXCLUSIVE: I have learned that Syfy is finalizing a deal to pick up 7 additional episodes of its flagship series Warehouse 13, bringing the dramedy’s total fourth season order to 20 episodes. Syfy renewed Warehouse 13 for a fourth season in August with a 13-episode order, the size of the show’s first 3 seasons. Warehouse 13, about two Secret Service Agents (Joanne Kelly, Eddie McClintock) working at a government warehouse for supernatural “artifacts,” remains Syfy’s flagship scripted series, drawing some 2 million viewers in Live+Same Day during its most recent third season. Last summer, it was used to launch the cable network’s newest drama, Alphas.