Despite Dean's directive to forget about looking for a cure for the Mark of Cain, Sam continues to do research. Dean suspects Sam is hiding something but decides to focus on a new murder case where they run into Cole. The three team up and learn a Khan worm is infecting men and turning them into murderers. Unfortunately, the worm makes its way into Cole.
| Creator | Eric Kripke |
|---|---|
| Actor | Jared Padalecki, Jensen Ackles, Misha Collins |
| Country | United States of America |
| Production | Kripke Enterprises |