LIFELeonard Nimoy's career in photosLeonard Nimoy best known as Mr. Spock from the original "Star Trek" television series flashes his Star Trek character's "Live long and prosper" greeting as he arrives at the LA premiere of "Star Trek Into Darkness" on Tuesday, May 14, 2013 in Los Angeles.Jordan Strauss, Invision/APLeonard Nimoy played Mr. Spock in the original 'Star Trek' TV show and movies.HandoutWilliam Shatner as Captain James T. Kirk and Leonard Nimoy as Mr. Spock in the original 'Star Trek' television series.HandoutLeonard Nimoy was right at home with Jim Parsons as Sheldon during a guest appearance on CBS series "The Big Bang Theory." In the episode, Penny buys Sheldon (Jim Parsons, left) "Star Trek" collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock (voiced by Nimoy).Mony Brinton, CBSLeonard Nimoy, right, who played Spock in the original Star Trek series, laughs as he is greeted by Erin Crane, of the Vulcan, Alberta, tourism board, as he arrives for a ceremony naming Vulcan, Alberta, the "Official Star Trek Capital of Canada" in Vulcan, Friday, April 23, 2010.Jeff McIntosh/The Canadian Press, APIn 2007 Leonard Nimoy posed with actor Zachary Quinto at the Griffith Observatory in Los Angeles, CA. Quinto took over the role of Spock in 2009 Star Trek film.Dan MacMedan, USA TODAYIn 1999, Leonard Nimoy posed for USA Today.Todd Plitt, USA TODAYLeonard Nimoy demonstrates the Vulcan Mind Meld on Star Trek co-star William Shatner at a DVD/video signing for "Mind Meld: Secrets Behind the Voyage of a Lifetime" in Los Angeles, CA in 2002.Kevin Winter, Getty ImagesIn 1993, Leonard Nimoy made a celebrity guest appearance as himself in the FOX animated series The Simpsons.Fox1995 USA Today portrait of actor Leonard Nimoy.Matt Mendelsohn, USA TodayFeatured Weekly Ad