You forget that Rose Tyler and Jackie were trapped in a parallel world that the Doctor could not visit.
The episode just this week had The Doctor telling Captain Jack Harkness that Rose didn't die but is safely alive in a parallel universe. Jack lets it slip to Martha that Rose was a blonde.
49 posted on 09/22/2007 10:55:40 PM PDT by higgmeister
(In the Shadow of The Big Chicken)
65 posted on 09/23/2007 12:44:15 AM PDT by ATOMIC_PUNK
(In everyday life there is more than meets the eye to reach the depths of truth we must DRAGTHEWATERS)