Supernatural
When the Levee Breaks
TV Flash files “When the Levee Breaks” as hour 81 of 327 in the TV Flash guide — Supernatural (2005–2020) on WB/CW, season 4, episode 21, aired 2009-05-07, 60 min.
From the desk
How this hour is filed
This leaf is S04E21: listed hour 81 of 327 in the Supernatural guide, hour 21 of 22 in season 4. It aired 2009-05-07 (60 min). The listed hour before it is “The Rapture” (S04E20). Next is “Lucifer Rising” (S04E22).

Catalog log
Broadcast listing — not a TV Flash recap.
Dean and Bobby lock Sam in Bobby's panic room so he can detox from the demon blood. However, as Bobby sees more seals are being broken he tells Dean they should let Sam out to help them fight the impending apocalypse. Dean disagrees and goes to Castiel for help. Sam and Dean have a big blowout confrontation.
Viewer FAQ
Where does When the Levee Breaks sit in the Supernatural guide?
S04E21 is listed hour 81 of 327 — hour 21 of 22 in season 4, season 4 episode 21.
When did Supernatural S04E21 air?
When the Levee Breaks aired 2009-05-07 and is listed at 60 minutes.
Where should I start Supernatural?
The WB premiere: two brothers, an Impala, monster-of-the-week highway TV. Early seasons are the horror-road mythology before the threat ladder goes cosmic.
In the series
Why this series still plays
Sam and Dean Winchester hunt monsters across America in a black Impala while family loyalty refuses to stay buried. Eric Kripke's WB/CW series became a 15-season fandom religion: Jensen Ackles, Jared Padalecki, salt-and-burn cases, Carry On Wayward Son. Genre longevity as found family forever.
September 13, 2005, The WB puts two brothers and a black Impala on the night like a network once put a cop and a car on Friday: American horror highway TV. Sam and Dean Winchester hunt monsters while destiny, demons, and family loyalty refuse to stay buried. Eric Kripke's series moved to The CW and ran fifteen seasons through 2020 — among the longest-running North American sci-fi/horror series, 327 episodes. Jared Padalecki and Jensen Ackles made brotherly banter a survival skill between salt-and-burn cases;…
Filed against
- Jared Padalecki as Sam Winchester
Jared Padalecki’s Sam Winchester hunted monsters across America in a black Impala while family loyalty refused to stay buried — fifteen seasons of WB/CW religion, salt-and-burn cases, Carry On Wayward Son. Genre longevity as found family.…
- Jensen Ackles as Dean Winchester
Jensen Ackles’s Dean Winchester drove the Impala like a liturgy — Sam beside him, monsters across America, family loyalty that refused to stay buried. Fifteen seasons of WB/CW fandom religion, salt-and-burn cases, Carry On Wayward Son. TV…
- Misha Collins as Castiel
Misha Collins’s Castiel walked Supernatural into a 15-season fandom religion — Sam and Dean, a black Impala, salt-and-burn cases, Carry On Wayward Son, Eric Kripke’s WB/CW monster road. Genre longevity as found family. TV Flash files him…
- Jim Beaver as Bobby Singer
Jim Beaver’s Bobby Singer kept Supernatural’s brothers in a junkyard of lore — Impala liturgy, fifteen seasons of salt-and-burn, found family as a fandom religion. The hunter who would not stay a cameo. TV Flash files him as the surrogate…
- Mark Sheppard as Crowley
Mark Sheppard sold hell with a smirk as Crowley on Supernatural — Sam and Dean in a black Impala, salt-and-burn cases, a 15-season fandom religion on the WB/CW. Family loyalty that refuses to stay buried. TV Flash files him as 2000s genre…
- Jeffrey Dean Morgan as John Winchester
Jeffrey Dean Morgan’s Negan is The Walking Dead as a Monday-night spoiler with a bat — zombie apocalypse as a decade-long group chat, comic-versus-show death trials included. AMC’s horror tentpole made appointment out of the undead. On TV…