Board Thread:The Reference Desk/@comment-5545417-20131116122722

When a Doctor meets a future version of himself, a matter is: will he know now what he will look like? Will he remember what they have said and done, when the older one meets the younger?

My questions are: in which TV or audio multi-Doctor stories do the youngest Doctors forget their rendez-vous with any older Doctor, and how? In which ones do they remember their future selves, instead?

For example:
 * In Time Crash, the Tenth Doctor remembers at least the solution for the problem with his and the Fifth Doctor's TARDISes.
 * In The Light at the End, all Doctors seem to forget their adventure (even if after they go and see Bob Dovie, without knowing why). 