Michelle Monaghan found herself pulling not just double duty playing twins Leni and Gina in Netflix’s twisty new mystery drama “Echoes,” but quadruple duty as she portrayed the women playing each other after they switched lives once a year.The show, which is ready to become your next Netflix weekend binge, kicks off when Leni, who is living Gina’s life with Gina’s husband Charlie (Daniel Sunjata) in Los Angeles, gets a call from Leni’s true husband Jack (Matt Bomer), who tells her that Leni (who is actually Gina) is missing. And if all that sounds complicated, it was, but Monaghan worked to put in subtle details in her portrayals of the sisters.“It was really, really important, obviously, to individuate these personas, these women,” Monaghan said.