The Conference Valuation is the seventeenth episode of the twelfth season of The Big Bang Theory.
Bernadette and Penny go to San Diego for a weekend-long pharmaceutical sales convention. Meanwhile, Howard, Raj, Leonard, Amy, and Sheldon conduct experiments on Michael and Halley, whom Howard was left in charge of.
At midnight, Penny is holding a meeting at Zangen regarding their inflaminex drug and using their slogan “It’s a brand new day.”, when Bernadette shows up and tells everyone to leave.
The next day, Bernadette leaves to go to San Diego for a weekend-long conference, putting Howard in charge of Michael and Halley. In Apartment 4A, Penny has packed so much luggage, it’s like she’s leaving Leonard.