I am one of the rare "Smallville" fans that greatly prefer the darker seasons of late to the light-hearted, freak-of-the-week seasons that the show started with. Season 8 introduced the marvelous Tess Mercer (as excellently portrayed by Cassidy Freeman) who filled the shoes of an MIA Lex Luthor with more charisma and grace than, dare I say it, the great Michael Rosenbaum in the past couple seasons. Also among the characters this year is Davis "Doomsday" Bloome, who is taken to the next level by Sam Witwer, who plays the role in such a way that the viewers can actually sympathize for the tortured, lonely murderer that Davis has unfortunately become.
There are only two problems that I have with season 8. The first is that around episodes 8.03-8.05, the show lagged. A lot. The episodes, I thought, were quite boring and just not the best work that the "Smallville" writers have put forth. Specifically 8.03 "Toxic," which could've been a fantastic exploration of Justin Hartley's Oliver "Green Arrow" Queen character but ended up being a bland, practical snorefest.
The second problem is the Lana-arc in episodes 8.10-8.14. While 8.10 "Bride," 8.11 "Legion," and 8.12 "Bulletproof" were all outstanding and Kristin Kreuk delivered on every front in her reprisal as Lana Lang, the storyline of giving Lana super powers was extremely unwelcome to most fans (myself included) and, if anything, ruined what could've been a perfect end to the lengthy Clark/Lana storyline that has haunted "Smallville" since the first episode. 8.14 "Requiem" is a good episode, mind you, but the poorly done super!Lana storyline brings it and 8.13 "Power" down as the worst episodes of the season.
Now, there are definitely some blockbuster episodes that were perfect, in my eyes. The entire slew of episodes from 8.15 to 8.21 were brilliant - specifically 8.15 "Infamous," 8.16 "Turbulence" (a brilliant and emotionally raw exploration of the characters - specifically Jimmy Olsen), 8.18 "Eternal," and 8.21 "Injustice." Watching this season, I was in awe at how much the actors and actresses - and their characters - have grown since they were first introduced to us and I have yet to be disappointed by the work turned in by the fantastic Tom Welling, the outstanding Allison Mack, and the stunning Erica Durance.
Overall, I highly recommend that new viewers catch this season when its on sale and all "Smallville" fans should purchase this boxset as soon as it's released. As we enter season 9, which may very well be our last "Smallville" season, I have high hopes that the show will kick it into high gear and go out with a bang.