due to scheduling problems with Sarah Michelle Gellar. Just a few days before shooting, they learned Gellar would not be available to work outside on the night the scene was supposed to be filmed. "We had to take our rooftop setting and split it into two and shoot everything on the rooftop looking out towards the city in one direction with the real helicopter on the rooftop. Then on the stage, recreate the exact rooftop looking the other direction, shoot everything there, and marry them seamlessly," he explained. "It was one of the more impressive things we ever pulled off." Usually, Joss Whedon's name is listed first in episodes he has co-written and is credited for. In this episode, Tim Minear's name is listed first because he approached the editor and (jokingly) told him that his name comes first. Writing Writer Tim Minear said the script for this episode was difficult, because "it was Faith as we had never seen her before. It was sort of easy when it was evil Faith, which was a lot of fun. The problem was trying to make her turn realistic." He admitted to being nervous about writing Buffy's scenes because of the challenge of writing to her character and tone. He convinced Whedon to come in and write all of Buffy's scenes. Joss Whedon has said that he explained the process of writing one of his scenes: References External links Angel (season 1) episodes 2000 American television episodes Buffyverse crossover episodes Television episodes written by Joss Whedon Television episodes written by Tim Minear Works about atonement