To be fair, neither of them had really known who they were going to be, before stepping into the simulation proper. Not to mention that Tesla, at least, isn't familiar with any particular renditions of the story where Dr. Watson had been female. But neither is he familiar enough with holodecks to know when and where their programmed to make slight changes in the way things had been laid out in the story - not to mention for all he knows, the computer generated characters are seeing her as a man.

(Which is an interesting thought, and one he might have to look into later.)

It's the flickers that catch his attention first, although - as ever - it's Helen who manages to succinctly sum up the situation. He agrees with her assessment too, or rather the unspoken comment that none of this bodes well. He might certainly have been able to convince the program that they'd had a bit of money all along, but this is something entirely different.

"It is fascinating, though. Worrying, yes. But still fascinating."