Nice, bright cinematography to open Season Four. It's almost liberating to see Mulder and Jeremiah Smith go traipsing across the golden countryside under a bright blue sky - quite the contrast from the usual shadowy, backlit X-File sets. Not a fabulous episode (too much chasing and running going on) but very important for the plot points it opens up (the bees, the crops, the cloned children, the healing of Mulder's mother, etc.).
I really dislike the alien hitman - he's too much like the Terminator and it's unfair and illogical that he doesn't die like the other aliens when Mulder spikes him in the neck. I also thought it highly unlikely that Mulder could have avoided being stung by a single bee in the beehive, even after dousing himself with gasoline. The beehive set was awesome, though - very effective, and I loved the buzzing soundtrack.