In Double, the “Nameless Detective” and Sharon McCone — reunited at a private eye convention in sunny San Diego — team up to tangle with kinky lifestyles, double dealing and multiple murder. When Elaine Picard, head of security at the posh Casa del Rey hotel and an old friend of Sharon’s, falls to her death from a hotel tower, “Nameless” is a distant witness. And when McCone’s zealous pursuit o...