. >> reporter: laura prepond is spot on playing piper's on again, off again sultry love interest. >> ike to be the femme fatale of the group? >> oh god. it's funny. because when i first read the character i didn't think of her as this kind of femme fatale person. >> i know. >> and then it just -- but yeah i don't know. it's -- i love my character. she's awesome, she's a badass. >> reporter: with a cast layered and authentic, it begs the question -- >> have you all thought about how you would be as a prisoner? >> uh-huh. >> of course. >> yeah. >> we get asked that all the time. >> yeah we do. >> i don't think i would do as well as gloria. >> i will make your life a living hell! >> i think they want me to show and up throw things and arrgh! >> you don't know how you'd do. you might do very very well. >> you think so? >> i bet you would. >> i think we'd all be fine. >> it's why we kind of like get along. everyone's like, my god, the cast gets along so well. i think it's because of what they're talking about. >> why we don't have any other things. >> reporter: for "nightline," i'm amy rob