James Doohan, far right, who played Scotty on the television series "Star Trek," is shown in this Sept. 9, 1986 photo in Los Angeles with fellow Star Trek stars (from left) William Shatner, Nichelle Nichols, and Leonard Nimoy. Doohan has been diagnosed with Alzheimer's disease, his agent confirmed Tuesday, July 6, 2004. (AP Photo/Reed Saxon)