[ Oh Christ, he's nuzzling. Spock! Spock, he is nuzzling! Every part of McCoy is rigid and uncomfortable—Not from Jim's unorthodox affection, but from the fact that it is clearly stemming from some kind of illness or side effect that he knows nothing about. ]

A different me... [ That sounds worrying. Very worrying. McCoy doesn't need to deal with alternate realities any more than he has to. Spock's the one with the double, that realm then should stay over there! ] Jim, I haven't been accused of being cute since I was a kid. And I don't intend to be now. What the hell's gotten into you? Or on you? You said something about plants?

[ His judgmental eyes turn from Spock back to Jim, lips pursed with clear exasperation. ]

Did you touch unknown plant life, Jim?