SAN DIEGO – The Star Trek episode “Mirror, Mirror” featured a parallel universe, with alternate versions of Captain Kirk, Mr. Spock, Dr. McCoy, Scotty and Lt. Uhura.

Comic-Con felt a bit like that this weekend with two Kirks and a pair of Uhuras in attendance.

William Shatner and Nichelle Nichols, who originated the roles in the 1960s TV series, attended events commemorating the franchise’s 50th anniversary, while Chris Pine and Zoe Saldana, who play Kirk and Uhura in the latest Trek films, walked the red carpet at a Star Trek Beyond premiere screening at a waterfront park. Beyond opened in first place at the box office last weekend.

While attending “50 Artists, 50 Years,” an art exhibit celebrating Trek (which includes a…