Good news for “Dollhouse” fans. Fox will air all 13 episodes despite the show’s paltry ratings. The announcement came on the heels of impressive DVR data for last month’s “Dollhouse” premiere (up 50 percent from 1.0 to 1.5). “We’re going to run all the episodes,” Fox scheduling chief Preston Beckman told The Hollywood Reporter. “We’re not saying we’re happy with those numbers, or accept them, but we don’t have to overreact. During [November] sweeps we might have to jack up the numbers a little [with other programming], but we plan on completing the order for this show.” “Dollhouse” creator Joss Whedon said he’s writing the 13th hour to give fans a degree of closure. “We’ll definitely have closure, but will leave some doors open,” said Whedon.