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The Big Bang Theory (season 9)
The Big Bang Theory Season 9.jpg
Ninth season DVD cover art
Starring
Country of origin United States
No. of episodes 24
Release
Original network CBS
Original release September 21, 2015 (2015-09-21) – May 12, 2016 (2016-05-12)
Season chronology
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Season 8
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Season 10
List of The Big Bang Theory episodes

The ninth season of the American sitcom The Big Bang Theory started airing on CBS on Monday, September 21, 2015. It returned to its regular Thursday time slot on November 5, 2015 for the season's seventh episode. It concluded on May 12, 2016. On March 12, 2014, The Big Bang Theory was renewed for an additional three years, extending it through the 2016–17 season for a total of ten seasons.Laura Spencer was upgraded to the main cast during the season as Dr. Emily Sweeney, after being a recurring cast member for two seasons.

Like the previous season, the first six episodes of the ninth season aired on a different night due to CBS acquiring the rights to Thursday Night Football games. In May 2015, CBS announced at its annual upfront presentation, that the series would begin its ninth season on Mondays, before returning to the Thursday slot once the football games ended.

Filming for the ninth season began on August 5, 2015, according to posts on Twitter by several of the cast members including Melissa Rauch and Kunal Nayyar.

Laurie Metcalf reprised her role as Sheldon's mother Mary in episodes 1 and 24, and Keith Carradine returned as Penny's father Wyatt in episode 3.

Sheldon's maternal grandmother Constance who he calls "Meemaw" made her first long-awaited appearance in episode 14 and was portrayed by June Squibb and Leonard's father Alfred also made his first long-awaited appearance in episode 24 and was played by Judd Hirsch.

This was the first season to feature every main cast member of the show, including former main cast member Sara Gilbert, who made a guest appearance in the 200th episode.

Leonard and Penny elope in Las Vegas, live streaming the ceremony for friends at home. Leonard wrote a touching cosmology-based wedding vow while Penny recites "You've Got a Friend in Me". When they kiss after he carries her over the threshold, Penny is still bothered that Leonard kissed Mandy two years ago and is outraged to hear they work together. When Leonard and Penny return home, she goes to her apartment alone. Sheldon, confused and hurt by Amy's indecision about their relationship, insults her before all their friends watching the wedding at Howard and Bernadette's house. Amy openly breaks with him, upon which all leave except for Howard and Stuart, who actually see the wedding to the end. Sheldon calls his mother to return his great-grandmother's ring which he had intended for Amy, but Mary tells him to wait. Sheldon briefly considers dating Mandy to hurt Amy. He is angered that Penny knew Amy was unhappy and did not defend him. A dejected Leonard cannot believe he is spending his wedding night with Sheldon, though Sheldon always expected this.


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