(Very) Minor Spoilers Below: This episode continues the story started in Like A Virgin, where the Mother of All (now known as Eve) is free from purgatory and roaming the Earth. We find out more about her and her plot. Meanwhile, Sam, Dean, and Bobby are investigating a man who says he blacked out while he bludgeoned his family to death with a sledgehammer. While there, they run into Rufus, Samuel, and Gwen who are investigating as well. Obviously, Dean, Sam, and Bobby don't like Samuel because of his actions in Caged Heat, leading to some of the mistrust generated in this episode. During the investigation, the episode turns into a combination of Starship Troopers 2: Hero of the Federation (2004) and John Carpenter's The Thing (1982). If you've seen those, it's the creature from ST2 and the blood test from JCTT. If not, I'm not going to ruin the surprise. I did enjoy the episode and I'm glad they ended Samuel's storyline as well as finally continuing Eve's storyline. Maybe now they can have more episodes where they have to kill creatures while tracking down Eve and trying to figure out how to kill her (or maybe just do a repeat of season 5 and send her back to purgatory).