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Supernatural S4E21 — When the Levee Breaks
8.5
Supernatural•Season 4•Episode 21

When the Levee Breaks

8.5/10 · 6,511 votesMay 7, 200943 min

Ranked #15 of 22 in Season 4•−0.1 vs season avg

Discussion

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.

Directed byRobert Singer
Written bySera Gamble
Previous episodeE20 · The RaptureNext episodeE22 · Lucifer Rising
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Season 4 Episodes22

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Cast2

Jared Padalecki

Jared Padalecki

Sam Winchester

Jensen Ackles

Jensen Ackles

Dean Winchester

Crew2

R

Robert Singer

Director

Sera Gamble

Sera Gamble

Writer

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Episode Summary

"When the Levee Breaks" is episode 21 of Supernatural season 4. It scored 8.5/10 from 6,511 votes, ranking #15 of 22 episodes this season (season average 8.6). Directed by Robert Singer and written by Sera Gamble, it aired on May 7, 2009.

Next: E22 · Lucifer RisingBest of Season 4