CBS has issued the press release for tomorrow's episode of The Big Bang Theory, "The Maternal Combustion", the penultimate episode of the season. Laurie Metcalf and Christine Baranski reprise their roles as Sheldon's mother, Mary Cooper, and Leonard's mother, Dr. Beverly Hofstadter, respectively, in the episode.

Pictures from the eighth season finale of The Big Bang Theory, "The Commitment Determination", have been added to our episode guide. In the episode, Leonard and Penny are pressed by Sheldon to set a date for their wedding, while Sheldon grapples with changes in his own relationship with Amy.

CBS has put out the press release for tomorrow's new The Big Bang Theory, "The Graduation Transmission". Brian George and Alice Amter reprise their roles as Raj's parents.

CBS has revealed the storyline for the eighth season finale of The Big Bang Theory, airing Thursday, May 7. The network released the title and synopsis for the twenty-fourth episode of the season, "The Commitment Determination".

Pictures from tomorrow's new The Big Bang Theory episode, "The Communication Deterioration", have been added to our gallery. In the episode, Raj gets the opportunity to craft a message for NASA in case their mission discovers alien life, while Penny is unsure whether to audition for a movie or stay with her pharmaceutical job.