If an episode has two ratings, then the one on the right is for the uncut version. On Hulu, this season is available uncensored, in addition to being in HD.
1. Rainforest Shmainforest - TV-14-DLSV (Original rating)/TV-14-DLV (Re-rating)/TV-14-D (Current rating)/TV-MA-L
2. Spontaneous Combustion - TV-14/TV-14-L
3. The Succubus - TV-14-DL
4. Jakovasaurs - TV-14-DL (Original rating)/TV-14 (Current rating)
5. Tweek vs. Craig - TV-14-DL (Original rating)/TV-14-LV (Re-rating)/TV-14-V (Current rating)/TV-14-LV - A V for the flashbacks of Richard's wife dying in a plane crash.
6. Sexual Harassment Panda - TV-14-DLS - Need to rewatch.
7. Cat Orgy - TV-14-LS
8. Two Guys Naked in a Hot Tub - TV-14-DLS (Original rating)/TV-14-D (Current rating) - Randy masturbating in the hot tub was never actually shown and it only showed him about to, but it's brief, so it doesn't get an S. And people getting shot is too mild for a V.
9. Jewbilee - TV-14
10. Korn's Groovy Pirate Ghost Mystery - TV-14-L - An L for one uncensored use of “fuck” before Korn's song.
11. Chinpokomon - TV-14-DL - Need to rewatch.
12. Hooked on Monkey Phonics - TV-14-LS - Same reason as Brady.
13. Starvin' Marvin in Space - TV-PG-DLV/TV-14-L - One use of "asshole" is fine with a TV-PG-L IMO.
14. The Red Badge of Gayness - TV-14/TV-14-L
15. Mr. Hankey's Christmas Classics - TV-14-D/TV-MA-L
16. Are You There God? It's Me, Jesus - TV-14-D - A D for Mr. Garrison saying "This sucks balls".
17. World Wide Recorder Concert - TV-14-DS - There are references to incest, but it's too moderate for a TV-MA IMO.