: The episode marks the debut of Dick Roman (James Patrick Stuart), the powerful leader of the Leviathans.
In this episode, Sam and Dean Winchester find themselves on the FBI's "Most Wanted" list after two clone them and embark on a high-profile killing spree. The clones intentionally follow the chronological order of the brothers' past cases—hitting locations like Jericho and Blackwater Ridge—to frame the real Winchesters for mass murder. Release Date : October 28, 2011 Key Plot Points :
: At the end of the episode, Sam and Dean separate after Sam discovers Dean lied about killing Amy Pond.
: Bobby discoveries that sodium borate (borax), found in common cleaning products, can severely burn and slow down Leviathans.