Board Thread:Inclusion debates/@comment-2.26.183.189-20170416191252/@comment-5918438-20170417032708

Ah, never mind, I found the original mention:

TheChampionOfTime wrote: Also, Moffat takes the time to set up the fact that the Psychic Paper will alert the Doctor to anything attacking the vault. This never amounts to anything in The Pilot, but Friend from the Future has the Doctor looking at the paper before announcing that they have to go back to 2017. Furthermore, it is mentioned later on in The Pilot that the Doctor received a false alarm on his psychic paper (something about a student sneezing, I think).