On Monday's Jimmy Kimmel Live, Kimmel asked Ventimiglia whether Tuesday's season finale would finally reveal all the answers about Jack's death, to which the actor coyly responded: "I mean, maybe, maybe not."
"The one thing that you do know is that Jack is dead and everybody's fascinated with knowing how and when and why," Ventimiglia continued. "The thing that I keep thinking about, or keep talking about to people, is, worry about how he's living, why he's living. Those are the moments. You don't want to focus on a death. You want to focus on his life and his kids."
"This is your way of telling people you're not gonna learn anything tomorrow night, right?" Kimmel said with a laugh.
It looks like we'll have to wait until the This Is Us final airs Tuesday at 9/8c on NBC to find out.