Read More... William Shatner (Credit: AP/Richard Shotwell/Paramount Television/Salon) It’s a big year for “Star Trek.” The venerable franchise turns 50. Therefore, by association, it’s a big year for William Shatner, too. No surprise, but the inimitable actor-performer-icon, now 85, shows no signs of stopping. He never has. Shatner’s life-long, scattershot approach to his career has kept his fans guessing — in both the positive and head-scratching senses of the word — for decades. The new movie in the reboot series, “Star Trek Beyond,” starring that second-string cast (Chris Pine as Kirk, Zachary Quinto as Commander Spock, et al.), opens today.