The third season of “Peaks” will launch May 21 and run 18 episodes, it was announced by TCA’s Monday Showtime event in Pasadena. The “18 episodes” figure was originally disclosed by original/returning cast members Sherilyn Fenn and Sheryl Lee at Seattle’s Crypticon way back on May 24, 2015 though Showtime would not confirm it until the Monday TCA event.