 "Fearful Symmetry" was written by Steve De Jarnatt and directed by James Whitmore, Jr. Co-Producer J.P. Finn claimed that the hardest part of filming the episode was getting an elephant; this action required a permit for the animal to pass the border into Vancouver. Finn later revealed that the elephant used for the episode, named "Bubbles", was fantastic to work with. There was initially concern from the producers that the elephant would not run towards the truck for the episode's teaser. Instead, however, the elephant thoroughly enjoyed the truck and the producers had difficulty getting the creature away from it.
