Dean and Sam go to a psychiatric hospital in Oklahoma attending the request of a former hunter and they admitted as patients. They find that several patients have committed suicide and the responsible, Dr. Fuller, believes that all of them have come to the edge in their insanities.
Sooner the Winchester brothers discover that a Wraith that is vulnerable to silver is the responsible for the deaths and the only way to identify the monster is through the mirror that reflects the real appearance. However, Dean and Sam are attacked by the inner demons and they feel incapable to fight against the evil Wraith.
"Sam, Interrupted" is another episode out of the context of the Fifth Season, but I liked it a lot. The situation of Dean and Sam facing their own demons is interesting for those that follow the series. The conclusion with Dean and Sam fleeing the hospital without any consequences is weird. My vote is eight.
Title (Brazil): "Sam, Interrompido" ("Sam, Interrupted")