When the Levee Breaks

8.5
/10
Dean and Bobby have something frightening locked in Bobby's panic room: Sam, contaminated by demon blood. But as the apocalypse draws nearer, Bobby wants to free Sam to battle on their side.
S4.E21

Supernatural

When the Levee Breaks

season 4 episode 21

episode aired on may 2009

Episode rating

Season 4
9.4
E1
8.5
E2
9.2
E3
8.0
E4
8.4
E5
9.1
E6
8.4
E7
8.6
E8
8.6
E9
8.8
E10
7.9
E11
7.9
E12
8.6
E13
8.3
E14
8.6
E15
9.1
E16
8.6
E17
9.2
E18
8.1
E19
8.7
E20
8.5
E21
9.3
E22

Cast of episode