When did Supernatural Season 12 Episode 21 air?
Supernatural Season 12 Episode 21 aired on May 11, 2017.


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.

Sam and Dean are alarmed when they learn hunters are being killed by suspicious “accidents” all over the country. They decide it is best to find Mary and make sure she’s safe. Meanwhile, Toni is back in the states and she and Mary face off.
Direct answers for episode-level questions and details.
Supernatural Season 12 Episode 21 aired on May 11, 2017.
This episode runs for approximately 42 minutes.
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