"School Mates" is the thirteenth episode of Season 5 of The Ren & Stimpy Show, which aired on November 11, 1995.
An old obedience school friend of Ren's comes over for a surprise visit and is appalled that Ren is living a middle class lifestyle with a house cat.
- This is the first and only episode with Chuck.
- There was a reference to the painting Dogs Playing Poker.
- We see Ren's high school picture for the first time as well (oddly not having any kindergarten at all or any grade for that matter).