
It seems around the middle of the 4th season, the writing has just improved by leaps and bounds. After the whole "Lana is a witch that fights Kung-fu" episodes (which I kinda hated), the storyline just took off like crazy. Filler episodes became less frequent; less eps where some random powered nobody that Clark has to outsmart. And all of a sudden the main characters are becoming more of a main focus.
I loved how the theme of season 4 became identity. Lionel and Clark switch bodies, Lex splits into two people, Chloe gets taken over by a spirit, Clark gets amnesia. All of course are cliches, but it revealed a great deal about their characters. When Clark got amnesia, he still acted with morality. But hands-down, the best ep of the season was Onyx when Lex's evil half is separated. The evil half learns of Clark's powers and his weakness. Evil Lex offers Clark a chance to join together to rule the world. When Clark refuses, Evil Lex says something like "you will join me, or everyone you love will suffer!" and socks him with a kryptonite ring! I was like whoa whoa whoa dude. I even replayed it on my dvd player seconds later cuz it was such a dope scene.
Last night's ep was alright. Filler vampire halloween episode. The best part was when Clark talked about how he hated costumes. He said he loved the cape but hated the mask. Friggin awesome. Other than that... eh. Okay episode. But I love how Spike from Buffy is playing Brainiac. That's a great pick. I will never miss another episode again for that reason alone.