Stars from the intertwined worlds of comics, sci-fi, superheroes and anime will converge in the city at San Francisco’s own Comic Con. The city by the Bay infrequently indulges its nerdier side, but we all have massive costume boxes tucked away in our tiny apartments, so the cosplay should prove impressive. The star power is strong with this one, with appearances by the Twelfth Doctor, Peter Capaldi; committed Samwise Gamgee portrayer Sean Astin; and your favorite actor from Star Trek, Nichelle Nichols — plus many, many more.