12/16/2013 02:15 pm ET Updated Dec 19, 2013

This 'Dallas' Cast Member Was The Only One To Know Who Shot J.R. (VIDEO)

"Who shot J.R.?"

While millions of "Dallas" viewers pondered one of the television's biggest mysteries, one cast member had all the answers. Linda Gray, who played Sue Ellen Ewing on the hit 1980s show, revealed on OWN's "Oprah: Where Are They Now?" that she was the only member of the show's cast to know.

"The cast was one of the last seven people on the planet to know who shot J.R.," Gray's co-star Patrick Duffy said. "None of us knew except Linda."

Gray added, "And I did know because I had to go into a recording booth and record the famous words, 'Kristin, it was you who shot J.R.' So I knew."

Duffy joked, "That's why I trust Linda with the secrets of my life, because she would not tell a soul."

OWN Executive Producer Jill Van Lokeren and producer Julie Mirlicourtois joined host Nancy Redd on HuffPost Live to share behind-the-scenes stories of Duffy and Gray's episode of "Oprah: Where Are They Now?"

Watch the full conversation on HuffPost Live.