like you can save that time and go back to that time in the tardis

so like, using saves to go to certain other saves on the same map? but utilised by having the tardis do it for you?

yes but maybe the saves don't effect the tardis so when i spawn a headcrab in there and save it then kill it then go back to that save with the tardis it wont be there sense its not outside the tardis

but i don't think that's possible cause it would effect the whole map

Not a single clue what you're on about since I don't play Black Ops but the idea sounds great

it would be to hard to do plus just use a back to the future mod one of em has time travel