I've got several problems with The Sixth Extinction. So why do I give it a rating as high as a 7? Because it's still interesting and entertaining to watch. I don't like some of the inconsistencies from previous seasons. In season four's Tunguska, Mulder is infected with the alien virus via the black oil. He then is given the vaccine that apparently cured him. I guess not, since they're saying that Mulder's exposure to the artifact activated the virus within him. I felt it was a contrived reason for bringing Kritschgau back to the show. Before he was just a DoD lackey who helped dissuade Mulder from his belief in aliens. Now, he's apparently some expert in ESP, that Mulder already knew about. Mulder's in a psych ward, yet he found access to a red marker to write "HELP ME" on a piece of clothing to give to Skinner? In my Biogenesis review I mentioned how creepy Dr. Barnes was and that he was well cast. Several months later, they bring him back to the show, but now he's just plain annoying. He is given really lame dialogue that grates at the ears, and he's no longer creepy, just annoying. I also don't like the idea that apparently aliens just want to use Navajo to record all religious text and DNA sequences on their spacecrafts. Why? They can't write it somewhere else? Barring numerous shots of Scully's chest which may have helped me get through this episode easier, I still like this episode. I don't like the direction that the mythology is going, but the action contained within The Sixth Extinction still makes for an entertaining hour of television.