Regardless of its odd placement, yes, it was a good episode. I thought that was interesting, how this time he was killed by his mother. It was a random walker, in the comic, right? Carl's becoming more like his comic self, rather than the stupid kid that got Dale killed, in Season 2. Still, he shot her when she was dead. I wonder how he would've reacted, if she had become a walker. And yeah, I don't know why they didn't help that guy. But that's just how Rick is, in the show. He doesn't want to trust anyone.