Veteran stars of the revamped sex-and-scandal show, including Patrick Duffy and Linda Gray, joined new actors Josh Henderson and Jesse Metcalfe to share their memories of Hagman, who died a year ago this week (beg18Nov13).
The resulting film, titled Memories of Larry Hagman: A Cast and Crew Tribute, will feature on a special four-disc release of the show's 2013 season.
Other extras in the set include a film exploring how Hagman's death - and that of his infamous Dallas character, the backstabbing oil baron J.R. Ewing - was dealt with onscreen, an extended version of the episode showing J.R.'s funeral, and one of Hagman's last ever interviews.
Hagman died on 23 November last year (12) after a battle with cancer.
The Dvd is due for release in February (14).