The Separation Triangulation
Raj becomes involved with a recently separated school teacher, and her husband is anxious to meet him.
The Solo Oscillation
When Sheldon kicks Amy out to work solo, she and Leonard bond during a series of science experiments. Also, Bert the geologist replaces Wolowitz in the band Footprints on the Moon, and Sheldon finds Penny a surprising source of scientific inspiration.
The Matrimonial Metric
Sheldon and Amy will try to use science to see who should be their Maid of Honor and Best Man.
Honey is excited to attend a parenting class that encourages moms to listen to their babies taught by self-proclaimed child sage, Wilhelmina Page (Niecy Nash), but when her mother, Anne (Cheryl Hines), ridicules the idea, it exposes communication issues of their own. When Honey turns to Jessica for support, she is disappointed to find that even her best friend doesn’t have her back. Meanwhile, Louis and Marvin are thrilled when they get to go on the free cruise their wives won on “Wheel of Fortune,” but their boys’ trip quickly turns into a gambling getaway gone south. Back in Orlando, Eddie’s friends are wary of his new crush at school.
Little Tools, Big Challenge
The chefs make upscale versions of kid-menu classics while using child-sized cookware, utensils and mixers; after a visit to a food incubator, the chefs must present dishes based on their own heritage for immigrant food influencers.
The Undaunted Soul! Brook vs. Big Mom!
The Celebration Reverberation
Sheldon and Wolowitz plan birthday celebrations for Amy and Halley, respectively. Also, Leonard receives a Christmas letter from his brother that causes him to spiral out about his own lack of accomplishments.
The Confidence Erosion
Sheldon and Amy try to use math to eliminate wedding planning stress; Koothrappali “breaks up” with Wolowitz after realizing he is hurting his confidence.
As the group struggles with the disappearance of one of its own, they accept sanctuary in a town run by its Sheriff and his troops; Dmitri inches closer to achieving his darkest goal.
The Bitcoin Entanglement
The gang hunts for a “valuable” old laptop.