In the penultimate episode of “The Big Bang Theory,” titled “The Change Constant,” everything changes for Sheldon Cooper and Amy Farrah Fowler—the married, science-minded couple played by Jim Parsons and Mayim Bialik—when they find out they’ve won the Nobel Prize in physics for their shared work in super asymmetry.

Also, after several years, their building’s elevator gets fixed.

After seeing pictures of herself online that she doesn’t like, Amy, aided by Raj Koothrappali (Kunal Nayyar), gets a pretty modest and slightly modernized makeover … but as it turns out, Bialik wasn’t a big fan of this plotline.

In Jessica Radloff’s 2022 book “The Big Bang Theory: The Definitive, Inside Story of the Epic Hit Series,” Bialik told the writer that she didn’t know if Amy needed a makeover, though she acknowledged that she benefited from it on a personal level.

“So it felt really good that people could see me that way, but in some ways, it did feel like a betrayal of our Amy,” Bialik continued, name-dropping a department store that shut down in 2018.

“We didn’t go crazy and have her dressing in ways that completely didn’t look like her.

She still wore kind of sensible things—like what you’d get at Loehmann’s.” Changing Amy’s appearance was still something Bialik had a major conflict about.

“I thought it would be, ‘Let’s dress Amy up and take her out for the night!'” I didn’t think it would be like, ‘Here’s her new normal!” (What Bialik means by that is Amy maintains her “new style” during the Nobel ceremony, though she does add a very personal, very “Amy” touch … a tiara.)

Executive producer and writer Steve Holland also spoke to Jessica Radloff extensively for her book, and while he acknowledged that Mayim didn’t love this storyline, he felt like it made sense for the narrative.

“I think this was one of those moments where the story in the script wasn’t exactly the way Mayim had pictured it,” Holland revealed.

“We felt that the storyline was honest, because oftentimes, when people see themselves on TV or in pictures all the time, it can make them self-conscious.