Season 9 of CBS’ “The Big Bang Theory” has spent a lot of time finally progressing the very sweet, but usually awkward, relationship between Sheldon (Jim Parsons) and Amy Farrah Fowler (Mayim Bialik). Now that they’ve become physical, the time has come to introduce her, and the audience, to Sheldon’s much talked-about grandmother.

After spending nine seasons referencing her and the odd lessons she’s imparted on Sheldon and his genius, episode 13 will finally give Meemaw life in the form of famed actress June Squibb. While meeting the relatives is normally a happy occasion, nothing is that simple when dealing with anyone from the Cooper clan, and her introduction makes the couple question their relationship. 

“Sheldon’s grandmother, aka Meemaw, visits and there’s friction between her and Amy, which intensifies after the elderly woman blurts out a secret about Sheldon,” the TV Guide synopsis for “The Meemaw Materialization” reads.

It’s unclear exactly what secret Meemaw could reveal that would shake the fabric of Amy and Sheldon’s relationship, but given the fact that she’s got more intimate knowledge of him than almost anyone else on the show, the possibilities are virtually endless.

Meanwhile, Raj (Kunal Nayyar) is having some girlfriend struggles of his own. “Raj is conflicted when an attractive writer for a children’s sci-fi show asks to collaborate with him," the summary reveals.

Sneak peek images for the new episode indicate that the woman's name is Claire and she's played by actress Alessandra Torresani. When they meet at the comic book store, it forces the character to completely question his relationship with Emily (Laura Spencer). Since her first appearance in Season 7, Raj and Emily have been trying hard to make their rocky relationship work. Although they love each other, their time together has been plagued by other men and women, hurt feelings and comically outrageous screw ups. If there exists a pairing on the show that’s in serious danger of the temptation that is Claire, it’s Raj and Emily.

To see how it all shakes out, fans will just have to tune into the latest episode of “The Big Bang Theory," which airs Thursday at 8 p.m. EST on CBS.