Not too much bad things, Smallville is just like the normal hero movies. (spiderman, superman of course, batman, iron man, etc.) It's the same old content of normal hero movies; just a little bit better. I love this show too much and I am on Season 10 like many people... and I have skipped Seasons 8, 5, and 3. Reasons: 8 - Doomsday, 9 - Boring, 5 - too much kissing. I have been watching this since I was 11... I say 12 because if I was 11 and I didn't know which seasons or episodes were bad and which weren't, then I would have said no. But if it is a 11-year-old who is smart, and knows what he or she is watching, and knowing that he or she knows what episodes or seasons or bad, then I totally recommend this show for anyone 11 and above. If you are 11 and reading this, well then you're all set to know what to watch. I guess you can watch season 9. The zombie episode when Lois Lane turns into a zombie isn't scary or violent... it's fine for 11. Other episodes like the one mentioned above in the info is not good either. The last episode of Season 6, I do not recommend. That is the show that made me have a little trouble getting over. For the ending: too perfect for 12 and above! (good for 11)