Iraq, Brennan wanted Gibbs to be in a position where he could save Tyler as if she were his own daughter. The ending of the episode differed during the writing process. The original ending would show Gibbs burying his daughter's time capsule in his garden, showing he has put her to rest. However when "Requiem" was being written, Brennan thought of the two photographs, one showing Gibbs with Tyler and another of Kelly, they would be placed in a juxtaposition where it would appear Gibbs has his arms around Kelly. While the episode was filmed, Brennan stated that "everyone, right across the board, every department involved in making this show was challenged by that episode." He also described Wharmby's directing style, stating "[Wharmby], who's just a fabulous director, has an ability to take a script, to get inside it, to understand it. And he's an old-fashioned director. He gets out there. He doesn't sit in what we call video village. He gets out and stands beside the camera." One of the major sequences in the episode were the scenes taking place at the dock. They were filmed in two separate locations; the dock was filmed on location in San Pedro, the port district of Los Angeles, California, while the underwater scenes were filmed at a tank in the San Fernando Valley. While shooting in San Pedro, Michael Weatherly was allowed to run up to the water, but a stunt man later stood in to perform the dive. The underwater sequences took two days to film. The crew noted that water was one of the most difficult environments to shoot in, as it changed the light focus, and communication proved difficult. Before shooting took place, the cast and crew present followed the storyboards of the sequence. The water was also dyed to look murky. The filming crew also noted that Harmon did not hesitate to accept to perform underwater. Body doubles were on hand, but the producers were so impressed by how Harmon played dead, they felt one was not needed, as they believed one could not replicate the performance. "Requiem" was originally produced and to be released as the series' 100th episode. However, when the producers looked into the schedules, they realized the 100th episode would air the day before Halloween. Another season five episode "Chimera", seemed suitable to air on that slot. As a result, "Requiem" was pushed back