Re: 7x09 Hide - rating and discussion thread
Some things have too far-reaching of consequences to alter. If The Doctor can somehow see the possible outcomes of such changes and know that there is a 90% chance of them having a very negative effect or somehow effecting his previous self (or cause previous experiences to no longer have happened), he might just sum it up as "can't."
"There is no reason why good cannot triumph as often as evil. The triumph of anything is a matter of organization. If there are such things as angels, I hope that they are organized along the lines of the Maffia." - Winston Niles Rumfoord.