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.
Elenco:
Jensen Ackles
,
Jared Padalecki
,
Misha Collins
,
Alexander Calvert
,
Mark Pellegrino
,
Mark Sheppard
,
Alona Tal
,
Candice Accola
,
Felicia Day
,
Genevieve Padalecki
,
Jeffrey Dean Morgan
,
Julie McNiven
,
Katie Cassidy
,
Lauren Cohan
,
Osric Chau
,
Richard Speight Jr.
,
Rob Benedict
,
Samantha Ferris
,
Ty Olsson
.