Roku has picked up a second season of “Cypher,” an FBI-themed crime drama series, for which it was the exclusive North American carrier of the first seven-episode season. In territories outside the U.S. and Canada, the show is represented by Screen Media Ventures, which is launching it at the MipTV market this week. “Cypher” tells the story of an FBI code-breaking specialist who discovers a secret organization’s hit list and must navigate the murky waters of loyalty and betrayal among an undergr