I have a soft spot for John Black... no idea why but he's such a good guy. This episode gave us more of the idea that things maybe worse than shadows still work on earth. We get the idea that Gideon will push and poke until he is in the sites of some powerful and angry guns! Od course, that is probably the reason they sent him on the cure mission in the first place.

Every episode makes me wish we'd gotten more or at least a movie to tie it up like Firefly did.