This is a classic episode, one of those you can't help but watch every time it reruns. It's also interesting because Jerry gets to be as funny as George or Kramer, his very "serious" and "scientific" approach to the now famous "second spitter theory" certainly deserves its spot in TV history.

Even for a Brazilian woman who has absolutely no interest in American sports for a male target audience, I found Jerry's man-crush on a sport legend completely funny and understandable, I guess guys will be guys anywhere in the world, and this kind of man-crushes is really universal.

A truthly great episode.

This is the reason why I'm all for two-parters. Human Nature has an excellent pace, it doesn't rush to a climax, and that leaves plenty of time to develop characters well and also build up a solid storyline.

I liked Martha in this episode, her character is growing, though I do agree with many people who post in the tv.com forum: her crush on the Doctor is getting really annoying. Still, the constant mentions of Rose annoy me even more - we could have done without it in this ep. It's great that companions aren't easily forgotten, but we are more than halfway through the season, so I think it could stop.

The positive: -Martha taking some serious responsability and taking care of the Doctor. -The Doctor's surprisingly vunerable human side, even though though he's still brillant. -The period setting and the claustrophobic feeling we get when inside the all boys school. -The sense of tragedy with the shadow of WWI to come soon.
-Creepy sweet little girl with red baloon.

The negative: -They weren't bad, but there was so much hype before over scarecrows, that I was a little disappointed. -Some things don't need to be said. Martha's "and it wasn't me" could have been implied only. I mean, we already know her well enough to guess that this was exactly what she was thinking.