Supernatural: Season 4, Episode 21

When the Levee Breaks (7 May 2009)

TV Episode  |  TV-14  |   |  Drama, Fantasy, Horror
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Ratings: 8.8/10 from 1,586 users  
Reviews: 6 user | 2 critic

Sam is becoming more and more inhuman. Dean and Bobby put him in the safe hold until he gets over his addictions. After Sam escapes with help, unknown to him, from Castiel, he finds Ruby ... See full summary »



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Episode cast overview:
Ruby (as Genevieve Cortese)


Sam is becoming more and more inhuman. Dean and Bobby put him in the safe hold until he gets over his addictions. After Sam escapes with help, unknown to him, from Castiel, he finds Ruby and begins to feed once again. Dean begins to truly believe that the old Sam is gone for good. Written by Chris Green

Plot Summary | Plot Synopsis






Release Date:

7 May 2009 (USA)  »

Company Credits

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Technical Specs


Sound Mix:


Aspect Ratio:

1.78 : 1
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Did You Know?


The episode is named after a song by Led Zeppelin. See more »


Sam Winchester: Stop bossing me around, Dean. Look. My whole life, you take the wheel, you call the shots, and I trust you because you are my brother. Now I'm asking you, for once, trust me.
Dean Winchester: No. You don't know what you're doing, Sam.
Sam Winchester: Yes, I do.
Dean Winchester: Then that's worse.
Sam Winchester: Why? Look, I'm telling you...
Dean Winchester: Because it's not something that you're doing, it's what you are! It means...
Sam Winchester: What? No. Say it.
Dean Winchester: It means you're a monster.
See more »


References Star Trek (1966) See more »

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User Reviews

Padalecki Awesomeness.
18 June 2009 | by (Missouri) – See all my reviews

This was an excellent episode all around. The writing was strong, the effects (what few there were) added punch to the story, and the actors broke your heart.

I respect Jensen Ackles as an actor and love his portrayal of Dean. I also ADORE the character of Bobby and am thankful to have Jim Beaver on this show. That being said, this episode, for me, was all about the Padalecki. In the scenes dealing with his hallucinations, he pulls out all the stops, letting every emotion show and holding nothing back. He uses what he is given to give his character more depth, and despite Sam's actions, Padalecki makes you sympathize, if not almost agree with the character's decisions.

And in the episode's final showdown, through the tension between the brothers, Padalecki still exhibits Sam's humanity in many subtle ways. When Supernatural ends, I expect to see a lot of Padalecki (and Ackles as well), because his talent deserves recognition.

7 of 7 people found this review helpful.  Was this review helpful to you?

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