Mary Crosby, whose character Kristin shot J.R. on the TV Show “Dallas”, is not gone for good from the show. Speaking to students at UCLA recently, Mary said she is returning to "Dallas” for the last two shows of the season. “It’s a treat to be part of the show. I would like to go back to ''Dallas” and do some guest shots…(but)…to be a regular would not be good for the show or me." Mary also said she is “sort of an "All-American Girl” despite ''Kristin”.(UPI Photo/Glenn Waggner/Files)