[s12e17] The Conference Valuation Review

Watch Penny's masterful drug-pushing pitch at the convention:

Penny and Bernadette travel to San Diego to promote a new drug. Penny, thriving in her role as a sales lead, catches the attention of Danny, a representative from a rival company that Bernadette despises.

Sheldon and Amy use the children to test cognitive and motor skills, much to Howard's amusement and Leonard's distress. [S12E17] The Conference Valuation

Danny offers Penny a job, leading her to realize she doesn't always feel appreciated by Bernadette.

Leonard realizes his mother, Beverly, performed similar experiments on him throughout his childhood. When he calls her to complain, she reveals that the "experiment" on him never actually ended. Danny offers Penny a job, leading her to

It is revealed that Amy intentionally brought the book to spark Sheldon's interest in having their own children—a plan that seemingly works as Sheldon begins discussing the logistics of having triplets or quintuplets.

Back at home, Howard is left alone with the kids and invites the guys over for company. The day takes a turn when Sheldon finds a book on developmental experiments for children. It is revealed that Amy intentionally brought the

Bernadette eventually fights to keep her, and Penny declines the rival offer, though Bernadette secretly keeps a napkin with Danny's high-salary offer hidden from Penny. The "Guinea Pig" Day