Title: Supernatural (American TV series)
Content:  The third season consists of 16 episodes that aired on Thursdays at 9:00 pm beginning October 4, 2007, and ending May 15, 2008. Originally 22 episodes were ordered for the third season, but production was halted on December 5, 2007, upon completion of the twelfth episode by the 2007–08 Writers Guild of America strike. The season number was shortened to sixteen episodes, with four new episodes airing in April and May 2008. The season focuses on trying to save Dean from his deal and tracking down the demons that were released from hell. Along the way, the brothers meet Ruby, a "good" demon, who has an interest in Sam and claims to be able 
Title: Supernatural (season 15)
Content:  The fifteenth and final season of Supernatural, an American dark fantasy television series created by Eric Kripke, premiered on The CW on October 10, 2019. The series was initially set to conclude in May 2020, but a hiatus occurred after the March 23, 2020 episode owing to production delays caused by the COVID-19 pandemic in the United States. The season resumed airing on October 8, 2020, and the series finale aired on November 19, 2020. The season consisted of 20 episodes and aired on Thursdays at 8:00 pm (ET), with the exception of two March 2020 episodes aired Mondays at 8:00 pm. This was the fourth season with Andrew Dabb and Robert Singer as showrunners.
Title: Supernatural (American TV series)
Content:  The fifteenth and final season premiered on October 10, 2019. The season consisted of 20 episodes and aired on Thursdays at 8:00 pm (ET) with the exception of two episodes in March 2020 which aired on Mondays at 8:00 pm. The series finale was scheduled to air on May 18, 2020. In March 2020, Warner Bros. Television shut down production on the series due to the COVID-19 pandemic. Later in March, showrunner Andrew Dabb revealed that the series would go on hiatus after the March 23 episode. The season resumed airing on October 8, and the series finale aired on November 19, 2020.
Title: Supernatural (season 7)
Content:  The series was renewed for a seventh season on April 26, 2011, and remained on Fridays at 9:00 pm (ET). The CW announced on August 20, 2011, that the season would be increased to 23 episodes, up one episode from the 22-episode pickup the series had previously received. On January 11, 2012, it was announced by the executive producer of the show, Robert Singer, that there was another cliffhanger ending planned for season seven.
Title: List of Supernatural episodes
Content:  Supernatural is an American supernatural drama television series, created by Eric Kripke, that follows brothers Sam (Jared Padalecki) and Dean Winchester (Jensen Ackles) as they travel throughout the United States hunting supernatural creatures. The series borrows heavily from folklore and urban legends, and explores mythology and Christian theology, and their main adversaries throughout the series are demons. The series premiered on September 13, 2005 on The WB. The first season was broadcast on The WB, and following The WB's merger with UPN in September 2006, Supernatural continued to be aired on the new network, The CW. All fifteen seasons are available on DVD in Regions 1, 2, and 4 and are also available on Blu-ray.
Title: Supernatural (American TV series)
Content:  The eighth season consists of 23 episodes that aired on Wednesdays at 9:00 pm beginning October 3, 2012, and ending May 15, 2013. One year after being dragged to Purgatory, Dean returns to Earth without Castiel, carrying inside his body the soul of a vampire named Benny. The two brothers begin a fight against Crowley to find the Demon Tablet and lock the Gates of Hell, thereby trapping all demons in Hell. The brothers use Kevin Tran to help them read the tablet and accomplish this. Castiel is brought back by an angel named Naomi, and takes possession of the Angel 
Title: Supernatural (season 14)
Content:  The fourteenth season of Supernatural, an American dark fantasy television series created by Eric Kripke, premiered on October 11, 2018, on The CW, and concluded on April 25, 2019. The season consists of 20 episodes and aired on Thursdays at 8:00 pm (ET). This is the third season with Andrew Dabb and Robert Singer as showrunners. The thirteenth episode of the season marks the 300th episode of the series.
Title: Supernatural (season 12)
Content:  The twelfth season of Supernatural, an American dark fantasy television series created by Eric Kripke, premiered on October 13, 2016, on The CW and concluded on May 18, 2017. The season consisted of 23 episodes and aired on Thursdays at 9:00 pm (ET) for the first 8 episodes before moving to 8:00 pm (ET) in January 2017. This is the first season with Andrew Dabb and Robert Singer as showrunners.
Title: Supernatural (American TV series)
Content:  The sixth season consists of 22 episodes that aired on Fridays at 9:00 pm beginning September 24, 2010, and ending May 20, 2011. Beginning with this season, Kripke did not return as showrunner, but still remained as a hands-on executive producer, leaving executive producer Sera Gamble to take over the reins. The sixth season begins a year after the conclusion of the fifth season, with Dean living a somewhat happy life with Lisa and Ben. When an emotionless Sam returns to Dean, he is forced to leave his new life behind and work with his resurrected grandfather Samuel to capture Alpha monsters for Crowley. The brothers are unable to get much help from Castiel since his time is occupied by a civil war raging in heaven against the archangel Raphael. Dean does not trust Samuel and his suspicions 
Title: Meet the New Boss
Content:  "Meet the New Boss" is the first episode of the paranormal drama television series Supernaturals season 7, and the 127th overall. The episode was written by showrunner Sera Gamble and directed by Philip Sgriccia. It was first broadcast on September 23, 2011 on The CW. In the episode, Castiel decides to go fix the world's problems as their new "God". However, he is being taunted by new evil forces known as the Leviathans. Meanwhile, Sam is now having hallucinations about his time in Lucifer's Cage.

Question: when does the new episodes of supernatural start?
Answer: October 12, 2017.
May 3, 2018.
October 12, 2017.