}}
== Summary ==
The boys take on a case Jo has researched in Philadelphia where blonde girls in an apartment building are disappearing. Jo, without Ellen’s permission, follows the boys to join them on the hunt.
While researching the case Jo shares with Dean that the reason she hunts is because it makes her feel connected to her father. They discover that the apartment building is built over the place H.H.Holmes, America’s first serial killer, was executed and that he may be holding his latest victim in a hidden room.
While searching the building, Jo gets captured by the spirit of H.H. Holmes. Sam and Dean rescue her and then use her as bait to trap him.
Ellen catches up with the boys and Jo, and there is a long uncomfortable drive back to the Roadhouse. We find out that Ellen believes John Winchester was responsible for her husband’s death.
== Music ==