Season 8

The eighth season of The Big Bang Theory ''was confirmed on March 12, 2014, after a 3-season deal with the network CBS which renewed the series through its tenth season, meaning that it will now run until at least 2017. The Big Bang Theory will start airing on Mondays, in front of The Millers only on October 20, the last episode on Mondays, all due to the NFL game schedule. It will move back to Thursdays on October 30, 2014 before Mom. The season premiere aired on September 22, 2014.''

As of August 4, Johnny Galecki, Jim Parsons and Kaley Cuoco-Sweeting have signed a three year contract for one million dollars for each episode. Simon Helberg and Kunal Nayyar have also signed a contract for three seasons for more than $750,000 per episode. There were some contract issues between Galecki, Cuoco-Sweeting, and Parsons, however these issues have been resolved.

November 12, 2014, Carol Ann Susi, the actress who played the role of Mrs. Wolowitz, Howard’s mother, has died after a brief battle with an aggressive form of cancer. In February, 2015, it was announced that the character of Debbie Wolowitz passed in "The Comic Book Store Regeneration".

Cast
In order of credit
 * Johnny Galecki as Leonard Hofstadter (15/15)
 * Jim Parsons as Sheldon Cooper (15/15)
 * Kaley Cuoco-Sweeting as Penny (15/15)
 * Simon Helberg as Howard Wolowitz (15/15)
 * Kunal Nayyar as Rajesh Koothrappali (15/15)
 * Mayim Bialik as Amy Farrah Fowler (15/15)
 * Melissa Rauch as Bernadette Rostenkowski-Wolowitz (15/15)
 * Kevin Sussman as Stuart Bloom (4/15)

Trivia

 * This season have the same number of 24 episodes, adding the total amount of episodes for the entire series up to 183. (Season trend)


 * Penny will have a new haircut based upon Kaley's new hairdo. Sheldon has problems with it. (Season trend)


 * Penny's mother may show up since the wedding is in the air. Lisa Kudrow is still Kaley's choice to play her mother, though no official casting has been announced.


 * Emily will be a recurring cast this season. (Season trend)


 * According to the production staff, Penny will, at least during her break from acting, be a pharmaceutical representative or salesperson at Bernadette's company. This causes relationship problems between Leonard and Penny and between Bernie and Penny. She will develop confidence and finally make a respectable income. (Season trend)


 * Stuart will still be living with Mrs. Wolowitz. (Partial season trend)
 * Tensions will heat up between Sheldon and Amy, though they resolve their problems, according to Mayim Bialik. (S8E01)


 * Sheldon gets appointed to a Junior Professor post. The job may, at least to Sheldon, be only a temporary job as he may only begrudgingly accept it as he is still trying to figure out what he wants to do. (S8E02)
 * The comic book store will be rebuilt. (S8E04)
 * Emily does not like Penny since she crawled into bed with Raj three years before. (S8E04)
 * Sheldon finally tells Amy that he loves her. (S8E08)
 * The girls dress up their men and re-do their proms on the roof of the building, which is the same place where they had Howard and Bernadette's wedding. (S8E08)
 * The gang meets a middle aged Howard Wolowitz type who falls for Penny and all of the girls. (S8E07)
 * Leonard will have a minor Septum surgery. (S8E09)
 * Raj's father visits the gang at Christmastime. Last season it was rumored that his parents might visit him. (S8E11)
 * Sheldon agrees to let Leonard move out and move in with Penny gradually. (S8E12)
 * Mrs. Wolowitz passes away while visiting her sister in Florida. (S8E14)
 * Amy writes a Little House on the Prairie fanfic about a fictional version of herself and Sheldon. (S8E15)
 * No Valentine's Day episode in 2015.