The new season of the clever, funny, sexy, all-around-great current iteration of Doctor Who starts on Saturday, April 23, on BBC America. It'll be the first of a two-part episode written by showrunner Steven Moffat, the same dude responsible for that badass new Sherlock show. ("Crunching of gears: from Who to Sherlock," Moffat tweeted early this morning. "Basically fewer exclamation marks.") I've watched this trailer three times already. Might watch it again here in a minute, actually.