It's all about family tonight on Supernatural as Jensen Ackles real life daddy Alan stops by. Alan Ackles joins the boys as a detective who is assisting them with their investigation into a murder in Minnnesota. It seems as though there's a bit of a pattern emerging, because a similar crime took place just six months earlier. There's no way the same person could have done it, but when a connection to a recently deceased athlete with Mayan heritage is discovered, things get a little bit freaky... as always.