Written in celebration of the 50th Anniversary, although not actually posted then. To make up for a lack of truly ''active'' Nine in ''[[Recap/DoctorWho50thASTheDayOfTheDoctor The Day of the Doctor]]'', Nine and Ten cross paths at a very specific point in Nine's life...

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!!This [=TARDISode=] Provides Examples of:

* AndTheAdventureContinues
* BittersweetEnding: Nine gets to go back to Rose, and Ten gets to send him back to it.
* CallBack: The whole thing happens in the first place because Ten was showing his Companions a black hole ''and'' a supernova (which he brought up and Watson wondered about in [[Recap/ChildrenOfTimeS1E2MenOfEngland "Men of England"]]).
* ContinuityNod: A fair few, not the least among them being the references to Two and Three bickering.
* {{Fanboy}}: For once, it's not Ten, but ''Nine'', who's ''thrilled'' to meet Sherlock Holmes and Dr. Watson.
* FandomSpecificPlot: Yet another fic taking place between Nine leaving Rose and returning for her... but this time, at least, we have Holmes and Watson and Ten.
* LikeAnOldMarriedCouple: Holmes and Watson think that Nine and Ten act like this. Holmes even wonders why the Doctor can't get along with himself if he's done this multiple times in the past.
* MyFutureSelfAndMe
* OhCrap: "But I offered! She said no!"
* ReversePolarity: "You were about to say something about reversing the polarity of the neutron flow, I just know it."
* SelfDeprecation: Plenty of it between the two Doctors, but this is the crowning gem:
-->'''Nine:''' What was I trying to do, impress a girl?
-->'''Ten:''' *blushes*
-->'''Nine:''' I ''was''? Aren't we a little old for that?
* SetRightWhatOnceWentWrong: Ten soon realizes that he has to set his own past back on course.
* SnarkToSnarkCombat
* {{Squee}}: "Victorian manners -- I love it."
* StableTimeLoop: With Ten having experienced this event twice now (in his past and now present), the loop is closed.
* TemporalParadox: Nine is unwittingly starting to cause one for Ten's past.
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