The iconic actor lost his battle with cancer on November 23, 2012 from complications from cancer. At the time of his death, he was midway through shooting scenes as scheming oil baron J.R. Ewing for the second season of the rebooted soap opera, and his death was incorporated into the storyline.
Several of his co-stars attended Los Angeles' Paley Fest event on Sunday to discuss the show, and they reminisced about their memories of Hagman.
Patrick Duffy recalled, "He was such an observer of the world in a very uncomplicated (way) that I think everybody thought he was more profound than he was. He was constantly aware of everything all the time. There was no agenda, there was no duplicity. He was not trying to work a room. He's just being Larry, and he's interested in everything that comes within his realm of being."
Linda Gray revealed that Hagman sang Frank Sinatra's I'll Be Loving You Always with his daughter on his death bed - and the actress was left spooked when the track played on the radio shortly after his passing.
She says, "It took my breath away. I thought, 'Larry, is that you?' So if you ever hear that song, you know that Larry is singing it to you."
Josh Henderson, who plays J.R.'s son John Ross Ewing III on the show, also told the audience how filming on Hagman's death scene was disrupted by falling props and outside noise and he's convinced there is a spooky reason behind the incidents.
Henderson adds, "I knew it was Larry playing a joke like he did every single day."
Executive producer Michael M. Robin has applauded the cast for using their real-life grief in funeral scenes for Hagman's character, telling TVGuide.com, "Everybody was still in this place of grief and sadness and (wanting to) celebrate his life. Everybody was still very connected - and still is - to Larry. It was hard for everybody but what it gave root to was a real, honest performance in every one of those scenes because everybody was in that kind of place. That's how they felt about the person, Larry, while they were talking about how they interacted with that character, J.R."