When did Supernatural Season 6 Episode 21 air?
Supernatural Season 6 Episode 21 aired on May 20, 2011.


Between darkness and deliverance.
When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them to be soldiers. He taught them about the paranormal evil that lives in the dark corners and on the back roads of America ... and he taught them how to kill it. Now, the Winchester brothers crisscross the country in their '67 Chevy Impala, battling every kind of supernatural threat they encounter along the way.

A demon kidnaps Ben and Lisa to get to Dean. Sam and Dean are forced to join with an unlikely ally to free them.
Direct answers for episode-level questions and details.
Supernatural Season 6 Episode 21 aired on May 20, 2011.
This episode runs for approximately 42 minutes.
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