From 1952 - 1956, Hagman served in the Korean War in the U.S. Air Force and he spent most of his time entertaining the troops.
In 1995, Hagman underwent a life-saving liver transplant. His organ transplant inspired him to work to promote healthy living. He served as the chairman of the American Cancer Society's annual Great American Smokeout for several years. He also worked to promote the National Kidney Foundation.
Although Hagman's largest successes were on television, he also played roles on the stage and in film. He continued working through 2012 on a new revision of "Dallas" which was filmed on site in Dallas, Texas for TNT.
Hagman’s final wishes were slightly unconventional. He asked to have his remains scattered over a fields of wheat and marijuana so that in a couple of years, a marijuana cake could serve up to 300 people. He wanted to share himself with those who remained behind.