A what-if fic speculating on how events would have unfolded if Kavanagh, instead of McKay, had been the last occupant of the alien being Sheppard picked up on that planet in "Doppelganger". It had to happen in some reality, right? Includes an an explanation for his snarkiness and general bad attitude.
I am SO bummed about SGA's cancellation, I suppose this means we won't see Kav again. *weeps*