John Addington, an actor, teacher and union leader, died Jan. 8 of a heart attack at his home in Dallas, Texas. He was 44.Born in Burlington, Iowa, Addington received graduate degrees in film from Southern Methodist U., where he later taught courses on the subject. TV credits included “The Trial of Lee Harvey Oswald,” “Time Bomb” and a “Dallas” episode. On stage he had roles in “Fiddler on the Roof,” “Witness for the Prosecution” and “A Funny Thing Happened on the Way to the Forum.” In addition to his TV and stage roles, he served as vice president of the Dallas branch of AFTRA and SAG from 1989 until his death. He is survived by his parents, two cousins and longtime friend Bill Jenkins. A union-sponsored memorial gathering was held Feb. 2 in Dallas. In lieu of flowers, the family requests donations to the Dallas AFTRA-SAG local’s John Addington Fund.