TV Supernatural - Season 12 Episode 21 : There's Something About Mary Supernatural - Season 12 Episode 21 : There's Something About Mary 8.3/10 by 7951 users 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. Details Casts Posters Images Title Supernatural - Season 12 Episode 21 : There's Something About Mary Alternative Titles 凶鬼恶灵, 邪恶力量, Zebunebrivi, Supernatural, SUPERNATURAL スーパーナチュラル, 슈퍼내츄럴, Сверхъестественное Subtitle Available ETC. First Air Date 2005-09-13 Last Air Date 2020-11-19 Number of Episodes 327 Number of Seasons 15 Genres Drama, Mystery, Sci-Fi & Fantasy, Networks The WB, The CW, Casts Jared Padalecki, Jensen Ackles, Misha Collins Plot Keywords , Sam Winchester Jared Padalecki Dean Winchester Jensen Ackles Castiel Misha Collins Episodes List Supernatural Season 12 :Episode 1 Keep Calm and Carry On 2016-10-13 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 2 Mamma Mia 2016-10-20 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 3 The Foundry 2016-10-27 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 4 American Nightmare 2016-11-03 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 5 The One You've Been Waiting For 2016-11-10 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 6 Celebrating the Life of Asa Fox 2016-11-17 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 7 Rock Never Dies 2016-12-01 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 8 LOTUS 2016-12-08 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 9 First Blood 2017-01-26 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 10 Lily Sunder Has Some Regrets 2017-02-02 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 11 Regarding Dean 2017-02-09 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 12 Stuck in the Middle (With You) 2017-02-16 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 13 Family Feud 2017-02-23 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 14 The Raid 2017-03-02 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 15 Somewhere Between Heaven and Hell 2017-03-09 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 16 Ladies Drink Free 2017-03-30 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 17 The British Invasion 2017-04-06 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 18 The Memory Remains 2017-04-13 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 19 The Future 2017-04-27 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 20 Twigs & Twine & Tasha Banes 2017-05-04 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 21 There's Something About Mary 2017-05-11 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 22 Who We Are 2017-05-18 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them... Supernatural Season 12 :Episode 23 All Along the Watchtower 2017-05-18 When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them...