With each passing episode, 'Fringe' gets closer and closer to its series finale and 100th episode "An Enemy of Fate," which began production this week following a celebration of the cult sci-fi hit's five-year run. The final season will resume with this Friday's "The Human Kind," but plenty of mysteries are left between now and then. In particular, we've been wondering; will sci-fi icon Leonard Nimoy's William Bell return, more than just his hand? New details from show-runner J.H. Wyman inside!