EDIT: Although "He Walked Among Us" appears to be a teleplay carried over from season two, not the third season. Hmm.
Yeah, Spinrad asked GR to kill it because he hated Coon's comical rewrite (this is the one they were trying to get Milton Berle to do.) Coon was gone partway through season 2, so that gives you a better timeframe, maybe.
Wonder about that other Coon/Cronin one, hadn't heard of that.