 Much of the episode was filmed on the Daedalus set . Due to that , visual effects were required to fill in the external shots . The episode was reportedly one of the most expensive VFX budgets in the series , and is the most expensive for the season . The star map behind the captain 's chair of the Daedalus is usually lit green . However , the episode 's writer and supervising producer , Alan McCullough , deliberately turned the map 90 degrees and changed the color from green to orange , so as to make the ship different from the normal Daedalus . McCullough also stated that the episode is a one @-@ off , but did not rule out a return beyond the fifth season . He also said that he originally planned the team to visit a reality where the Ancients won the war against the Wraith , but this idea was dropped as it would detract from the main storyline . The episode was Jason Momoa 's first appearance with his customised wig . After he had his hair cut by the time the fourth season was completed , for the first three episodes he had it sewn back on . However , when SCI FI wouldn 't allow his hairstyle to be changed , they switched to the wig after Momoa complained about the pain of having his hair sewn on again . 
