''[[http://www.fanfiction.net/s/5698125/1/However-Improbable However Improbable]]'' is a {{Crossover}} between the Literature/SherlockHolmes canon and ''Series/StarTrekTheOriginalSeries'', by [[http://www.fanfiction.net/u/1464384/KCS KCS]].

''An ancestor of mine maintained that if you eliminate the impossible, whatever remains, however improbable, must be the truth." - Captain Spock, ST:VI; original quote Sherlock Holmes, SIGN. Two universes, two worlds, one link threatening them both.''

It's a rambling epic largely about ThePowerOfFriendship. TheReveal of the villain should not surprise Sherlockian readers; however, there ''is'' a chilling twist to his character that basically takes him UpToEleven.
!!This story provides examples of:

* ArmorPiercingQuestion
* CallToAdventure
* ContinuityPorn: Boy, howdy! It's a CreatorThumbprint of the author's -- luckily, she has footnotes for the more casual fans.
* DeathGlare
* {{Determinator}}
* DistressedDude
* EvilTropes
** EvilGloating
** EvilIsDeathlyCold
** EvilPlan
** FauxAffablyEvil
* FireForgedFriends
* {{Foil}}: Kirk and Spock's friendship to Holmes and Watson's friendship.
** Also, Spock to Holmes.
* GambitPileup
* HeroicBSOD: [[spoiler:Holmes suffers this after killing Moriarty.]]
* HiddenVillain: [[spoiler:Moriarty's twenty-third century]] backstory.
* LoadsAndLoadsOfCharacters
* LoadBearingBoss
* [[spoiler:NearVillainVictory]]
* ThePowerOfFriendship
* {{Reconstruction}}: [[spoiler:Of the private war between Holmes and Moriarty, and of Moriarty himself as a character.]]
* TheReveal
* SadisticChoice
* SetRightWhatOnceWentWrong
* TimeParadox
* TookALevelInBadass: Dear heavens, [[spoiler:''Moriarty''.]]