 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.
