 The subplot required several effects to be added in post production to show the effects on the Enterprise due to the proximity of the sphere that the ship investigates . These were overseen by special effects supervisor Dan Curry . In order to portray Tarquin , Maury Sterling was required to wear a full head prosthetic while the character was in his true form . However , the majority of the time spent filming was while Tarquin was telepathically communicating with Hoshi , where Sterling appeared as himself . Both the writer and director had close ties to Star Trek : Voyager . Roxann Dawson portrayed Chief Engineer B 'Elanna Torres in that series , but her involvement in the Star Trek franchise has since led to her directing episodes of Enterprise , " Exile " being her sixth credit so far . Dawson had announced that she was due to direct this episode earlier in the year whilst appearing at the Las Vegas Creation convention on August 2 . " Exile " writer and series co @-@ producer Phyllis Strong also wrote episodes of Voyager , and has since gone on to write episodes of Enterprise as well . 
