Kaley Cuoco
Actress Kaley Cuoco poses at the 23rd annual "A Night at Sardi's" benefit for the Alzheimer's Association in Beverly Hills, California March 18, 2015. Reuters/Mario Anzuoni

"The Big Bang Theory" Season 9 returns with Episode 12 this week on CBS, after two weeks break. The preview of Episode 12, titled “The Sales Call Sublimation," provides a glimpse of Penny (Kaley Cuoco) complaining about man-child Sheldon living with her and Leonard (Johnny Galecki). She seems to be in a session with a psychiatrist, played by Jane Kaczmarek.

Kaczmarek has signed on as a guest star to play Dr Sarita Gallo in "The Big Bang Theory" Season 9 Episode 12. Penny meets Dr Gallo to make a sales call. When the sales call does not end on a positive note, Penny takes the help of her husband to convince Dr Gallo. She gets more than she bargained for when Leonard agrees to meet with a psychiatrist on her behalf, according to the synopsis of “The Sales Call Sublimation."

Penny and Leonard are set to discover many issues about their relationship and marriage that they were not aware about in "The Big Bang Theory" Season 9 Episode 12, according to spoilers leaked online.

In "The Sales Call Sublimation," Stuart (Kevin Sussman) finally moves out of the Wolowitz’s residence. And Sheldon (Jim Parsons), who finally engaged in coitus with Amy (Mayim Bialik) in Episode 11 of “The Big Bang Theory” Season 9, misses Amy, as she is attending a neurobiology conference, the spoilers reveal. Sheldon and Raj (Kunal Nayyar) collaborate on an astronomical discovery on "The Sales Call Sublimation."

In the previous episode of “The Big Bang Theory” Season 9 Episode 11, titled “The Opening night Excitation,” Sheldon spent the new “Star Wars” film premiere night with Amy, as it was her birthday. The two finally had sex in the episode.

“The Big Bang Theory” Season 9 airs on Thursdays on CBS in the U.S.

[Credit: YouTube/The Big Bang Theory]