More comic-book strangeness: This bizarre CW adaptation of the Archie comic books, with its darker tone and characters, is up to episode 11 out of this season’s 13, so we’re nearing whatever cliffhanger the writers have in store. Meanwhile, tonight, there are some sparks between Fred and Mary, whose renewed chemistry might have them rethinking their divorce. They’re played by two teen-idol icons from a previous generation: series regular Luke Perry and recurring guest star Molly Ringwald (who, in tonight’s episode, is Pretty in Black).