Set your phasers to stun and head downtown for the fourth-annual Cincinnati Library Comic Con. This year’s event celebrates the 50th anniversary of Star Trek with an exhibit of memorabilia ranging from the original series through the rebooted films, plus screenings of fan-favorite Star Trek movies. This daylong geeky get-together also features tabletop game play, cosplay contests, creator booths, special guest cartoonists/comics/graphic novelists and a drawing contest.
Noon-5 p.m. Saturday. Free. Cincinnati Public Library, Main Branch, 800 Vine St., Downtown, cincinnatilibrary.org.