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) - "Goddamn" being said five times is a plain TV-14 IMO.
5. Tweek vs. Craig - TV-14-DL (Original rating)/TV-14-LV (Re-rating)/TV-14-V (Current rating)/TV-14-LV - "Bitch" is said 6 times, so it doesn't get an L IMO. And a V for multiple flashbacks of Richard's wife dying in the plane crash with blood splattering on her face.
6. Sexual Harassment Panda - TV-14-DLS - An L for "puss" being said once in a sexual way, and an S for the photograph of a panda sticking his penis in another panda's ear.
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 - Necrophillia jokes aren't enough for a D, but one uncensored use of "fuck" during Korn's song earns an L.
11. Chinpokomon - TV-14-DL
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.