“Ren’s Bitter Half” is the fifteenth episode of Season 3 of The Ren & Stimpy Show, and aired on June 4, 1994.
- Indifferent Ren (debut)
- Evil Ren (debut)
- Hideously Evil Ren (debut)
Stimpy’s new genetic formula (Xb49) physically splits Ren into his two opposite halves of his personality: “Evil Ren” and (surprisingly) “Indifferent Ren”.