Supernatural
› Season 4
S4 E21: When the Levee Breaks
Dean and Bobby have something frightening locked in Bobby's panic room: Sam, who is corrupted by demon blood. With the apocalypse drawing nearer, Bobby wants to free Sam to fight on their side.
| Air date | May 7, 2009 |
|---|---|
| Runtime | 43 minutes |
| TMDB rating | ★ 8.1/10 |