Board Thread:The Reference Desk/@comment-5545417-20131116122722/@comment-1432718-20131119183401

There are a bunch of short stories with multiple Doctor interactions, but I can't think of any memory wiping offhand.

I think the Five Doctors thing is trying to explain away Five's apparent non-memory of experiencing these events three times already (and for that matter, Three has gone through them twice already and Two has gone through them one before).