The Change Constant

"The Change Constant" is the twenty-third and penultimate episode of the twelfth season of the sitcom The Big Bang Theory. This episode is the penultimate episode of the entire series. It aired on Thursday, May 16, 2019 immediately prior to the series finale.

Summary
Sheldon and Amy await big news.

Extended Plot
The Coopers win the Nobel Prize.

Sheldon is upset about the changes.

Amy is upset how dowdy she looked in the press and Raj gives her a makeover.

The elevator is finally fixed.

Credits

 * Guest starring:
 * Alfredo Tavares as Planetarium/Deli Patron
 * John Ross Bowie as Barry Kripke
 * Joshua Malina as President Siebert
 * Teleplay: To be entered.
 * Story: To be entered.

Critics

 * To be entered.
 * IMDb user review

Trivia

 * Ninth episode of the last ten episodes.
 * On the final night of TBBT, CBS will air two episodes. This is the first episode to be broadcast and the penultimate episode of season 12 and of the entire series.
 * The elevator is finally fixed.
 * The last night of new episodes of The Big Bang Theory.

Quotes
To be entered.