Ellen's daughter Jo proves to the Winchester brothers Ash taught her well to research a case file, notably on a Philadelphia apartment building where young blond female residents disappear since about 80 years, but after so many years the police never considered a serial killing. Dean reluctantly takes the case which seems genuine when Sam finds ectoplasm, but even covers for Jo when she follows them and quickly rents the room of the latest victim, understands when he finds she's hell-bent on 'hunting', even serving as bait, because it's her way to feel closer to her late dad, who once was a partner of pa Winchester. Ellen shows them the building is next to a former prison, the list of executed murderers includes the real name of H.H. Holmes, the first-ever American to be dubbed a serial (at the time 'multiple') killer. After searches for hidden rooms, like in Holmes' Chicago 'hell house' which had traps as well as dungeons for his sadistic slow murders, Sam figures out after Jo has ... Written by
Did You Know?
One of the mortuary photos seen on the table is of Elizabeth Stride, a victim of Jack the Ripper. See more
Among the research and paperwork on a table regarding H. H. Holmes and his crimes is a black and white photo of a dead woman. However, the photo is not of one of Holmes' many victims, it's of Elizabeth Stride, one of Jack the Ripper's victims. See more
Sam, I think I know what we're dealing with here... It's the Stay Puff Marshmallow Man