The Big Bang Theory Scene That Made Johnny Galecki Break Down In Tears

In the early days of "The Big Bang Theory" — only a handful of episodes into the first season, in fact — Johnny Galecki made an incredibly personal connection with his character Leonard Hofstadter, to the point where it drove him to tears.

In the season 1 episode "The Middle-Earth Paradigm," which marked the show's very first Halloween episode, Leonard decides to try and impress his new neighbor (and crush) Penny (Kaley Cuoco) by donning a hobbit costume from "Lord of the Rings" to attend her costume party. Unfortunately for Leonard, he also comes face to face with Penny's handsome — and seriously ripped — ex-boyfriend Kurt (Brian Patrick Wade), who's only wearing a loincloth ... and when Leonard tries to go up against Kurt, Kurt picks Leonard up to show that he's the more powerful of the two. In Jessica Radloff's book "The Big Bang Theory: The Definitive, Inside Story of the Epic Hit Series," Galecki opened up about how that moment affected him.

"I very much remember that moment," Galecki recalled. "It was a complex episode for me because I didn't feel a lot of personal connection with Leonard initially. And that episode — although I know it's not our best episode by any means — is where I felt I really met Leonard. He was bullied by Penny's ex-boyfriend, Kurt, and him picking me up as Leonard really affected me to the point where I think I cried after we shot the episode."

As Johnny Galecki told Jessica Radloff, that moment between Leonard and Kurt basically unlocked something for him about the character — due to his own real-life trauma around bullying. "I shared that with Kaley and Jim [Parsons, who played Leonard's best friend Sheldon Cooper] at the time because it really dug up some old schoolyard stuff for me. It didn't happen all week during rehearsal; it was only when we shot it that it really hit home — in a good way, though, because I had a way into Leonard and really began to understand him. Still, it kind of felt like an after-school special episode, which I hate, but we were still finding our footing."

I would argue, though, that a much more pivotal moment for Leonard comes after Penny's party ends. Leonard and Sheldon leave after Kurt picks Leonard up, and later, Penny — who's drunk by this point — shows up at the boys' apartment to apologize for her annoying ex, lamenting the fact that she always seems to pick absolute losers to date. When she kisses Leonard after he tells her that she's "perfect," Leonard stops them from going further, because Penny is drunk — proving that he really is a pretty solid guy.

Regarding that moment, Galecki reflected on it in Radloff's book and said that it's definitely something about Leonard that he admires — and emulates. "I hope I have carried some of Leonard's traits like that with me in real life," Galecki said. "When you love a character, there's certain things you want to retain from them on a cellular level. And there are certain things about Leonard that I certainly hope is the case."

Leonard's moment with Penny is quite sweet in this episode of "The Big Bang Theory," but according to one of the show's co-creators, they really experienced this in real life ... and everyone in the writers' room made fun of him over it. (Plus, they included it in the episode itself, which feels a bit like adding insult to injury to me.) As Bill Prady revealed in the book, something like this actually happened to him and he, like Leonard, handled the situation in the way he felt was appropriate.

"The story for me was very personal," Prady admitted. "When Penny gets drunk and comes on to Leonard, he basically says, 'That's not how I want this to happen.' And here's the thing about writers rooms: If you're gonna write about pain, you've gotta be brave, and talk about painful, embarrassing, awful moments from your life. So I told the story of my life in my 20s when I had fallen for a girl who had a boyfriend, and there was a party, she'd had a lot to drink, and all the sudden she let me know she was an option. And I said no. That was not how I wanted to have that experience with a person who was drunk and angry and possibly doing it for revenge."

"Chuck [Lorre, the show's other creator] mocked me mercilessly," Prady admitted, laughing. "And then we wrote the episode." You can watch this episode, along with the rest of "The Big Bang Theory," on Max now.