Classic characters and show regulars all feature in the moving episode, which doubles up as a tribute to the late actor, who passed away in 2012.
Watch a clip of Linda Gray's Sue Ellen at JR's funeral below:
JR was shot by a mystery killer in the previous episode, a nod to the famous 'Who shot JR?' storyline from the 1980s incarnation of the show.
"Our mission is to give Larry Hagman and JR a proper send-off," said Dallas exec Cynthia Cidre.
The 'JR's Masterpiece' episode airs on Tuesday, March 19 at 11pm on Channel 5.