 The " Counterfeit " story features the character Lisa undergoing plastic surgery to become Tessa 's double . Lisa was played by Meilani Paul before the surgery and by Vandernoot after it . The producers wondered whether the story needed to explain the change in Lisa 's voice , as she would be played by a different actor . They considered suggesting that her voice changed because of the surgery , then decided that Lisa would have voice training . After her operation , Lisa speaks with Vandernoot 's voice when posing as Tessa , and with Meilani Paul 's voice when the character was not acting . This was achieved using automated dialogue replacement during post @-@ production . 
 The " Counterfeit " story <a href='uninflect' title='1'><mark>features</mark></a> the character Lisa undergoing plastic surgery to become Tessa <a href='null_genetive' title='2'><mark>'s</mark></a>double . Lisa was played by Meilani Paul before the surgery and by Vandernoot after it . The producers wondered whether the story needed to explain the change in Lisa <a href='null_genetive' title='3'><mark>'s</mark></a>voice , as she would be played by a different actor . They considered suggesting that her voice changed because of the surgery , then decided that Lisa would have voice training . After her operation , Lisa <a href='uninflect' title='4'><mark>speaks</mark></a> with Vandernoot <a href='null_genetive' title='5'><mark>'s</mark></a>voice when posing as Tessa , and with Meilani Paul <a href='null_genetive' title='6'><mark>'s</mark></a>voice when the character was not acting . This was achieved using automated dialogue replacement during post @-@ production . 
The " Counterfeit " story feature the character Lisa undergoing plastic surgery to become Tessa  double . Lisa was played by Meilani Paul b4 the surgery and by Vandernoot after it . The producers wondered whether the story needed to explain the change in Lisa  voice , as she would b played by a different actor . They considered suggesting that her voice changed because of the surgery , then decided that Lisa would have voice training . After her operation , Lisa speak w/ Vandernoot  voice when posing as Tessa , and with Meilani Paul  voice when da character was not actin . dis was achieved usin automated dialogue replacement during post @-@ production .