Planet of the Apes (1974) - Episode 8: The Deception: Well, that was a bit contrived. I was convinced that the Dragoons had been around for a while; that hatred didn't just spring up because of the murder. And yet, as soon as two humans rescue a drowning ape, it's all, "Gosh, guess we were wrong about those humans."
I did like the reading-forbidden-stories aspect though; specifically the story of Esau and Jacob.