The writing on Supernatural has never quite knocked it out of the park, but as far as your small network dramas go, it used to be up there. What we got with “Of Grave Importance” was just lazy. The episode certainly had its interesting elements, given that a fair percentage of it was spent in the ghost perspective, and it also threw in a small plot twist that we haven’t seen in a while (but have seen many times before). But in the end, it was still pretty lazy. After receiving a call from hunter pal Annie, the brothers headed off to meet her and when she didn’t show up, they became naturally suspicious. After checking out where she was staying and working out what case she was on, they took it upon themselves to investigate.