Catherine Tate reprises her role as Donna Noble (previously seen in "The Runaway Bride") and joins the Doctor's side to foil an alien scheme involving weight-loss pills manufactured by Adipose Industries.
Part 1 of two. The living welcome the return of the dead, but the ghosts may not be what they seem as the Doctor seeks answers at the Torchwood Tower. Jackie Tyler: Camille Coduri. Mickey Smith: Noel Clarke.