05E07 - A Necessary Evil

Allison is more than a little dubious when the ghost of FBI Agent Cooper appears in her kitchen with information on the long unsolved murders by a serial killer known as the Gentleman Caller. The information turns out to be accurate and suddenly Cooper's back with information about another case. Feeling more comfortable now that he's come across once as being truthful,she decides to act on the information he's provided. Turns out things are not as straightforward as they first appear to be. At work, Joe comes under a lot of pressure to hire an engineer who's made very valuable suggestions on Joe's project. Ariel however has a dream that suggests the idea may have been stolen from someone else.