The stars of NBC's hit show revealed that the script pages containing the big moment were so hush-hush that there were fail-safes in place so it wouldn't leak.
“It was very secretive. We had scripts that were on red paper because they can’t be photocopied,” Ventimiglia revealed. “We had a password when we were talking about the actual event.”
So, what was it? “Marble,” the 40-year-old actor revealed.
“We think because it was because of Beyonce, y’all,” Metz shared.
“We heard that Lemonade was supposed to be called Marble, or our writers did, and so they decided that this episode or this experience was going to be called The Marble,” Moore said, prompting Hartley, who apparently had never heard of that story, to feign surprise.
Later in the interview, the cast and the Tonight Show audience came together to do a sweet "Big Three" chant in an effort to soften the blow of Jack's heartbreaking death. And as a consolation prize, the This Is Us ensemble joined Fallon in giving America a big embrace.
"I feel like after the episode, I need a hug from you guys, and America needs a hug," Fallon said, as Ventimiglia, Moore, Brown, Hartley and Metz came together in a huge hug, declaring, "We love you guys!"
After the episode, Ventimiglia promised that though Jack's final moments alive were revealed, this isn't the end of the Pearson patriarch on the show.
"Just so everyone knows it....#JackPearson lives in all of our hearts. He’s you. He’s me. He’s Us," he tweeted. "Thank you all for supporting our show. We love you all :) And this isn’t the end of Jack. Stay tuned."
This Is Us returns with a new episode Tuesday, Feb. 6 at 9 p.m. ET/PT on NBC.