soon learns they had also recently attacked a Xindi ship. Archer once again confronts Orgoth, demanding to know everything about the Xindi. To make him talk, he drags the Osaarian to an airlock, initiating the decompression cycle. Orgoth reveals that they downloaded the Xindi database, and provides the access codes to their computer. When the alien ship returns, Mayweather maneuvers Enterprise close enough for Sato to download 90% of the database. Archer sends Orgoth back to his people. Production Writer and co-producer Mike Sussman, wrote the script of the episode, originally intending for it to show the origins of the Orion species. But this was changed to a new species, the Osaarians, during rewrites. Sussman said it was a difficult script to write and even though he was officially the sole credited writer, that "Brannon [Braga] easily wrote half of it" and in particular gave credit to Braga for the confrontation in the airlock, which he thought was the best scene in the episode. The episode was shot over seven days, with the majority of filming taking place on standing ship sets for the Enterprise. The Command Centre set was used for the second time, having previously appeared in the first episode of the season. It had been introduced as a new set for the third season as an area on the Enterprise where the crew would plan their next move in the mission against the Xindi. A new set was created for the brig, where the Osaarian Orgoth was held prisoner. One day of filming was on sets to represent the Osaarian base, with the majority of those made up using green screens that would allow the sets to be digitally inserted in post production. Julia Rose made her debut as MACO Corporal McKenzie, having beaten between 25 and 40 other actors to get the part. The spacesuit costume that she wore in the episode was reused, having been created originally for the 2003 Paramount Pictures film The Core where it was worn by Hilary Swank. Rose had been a fan of Bakula from his time on Quantum Leap and described him as the "Dad" on set. Nathan Anderson appeared as Sergeant Kemper for the second time. Robert Rusler, who appeared as Orgoth, had previously been in the second season of Babylon 5 as Warren Keffer. "Anomaly" was the fifth episode to be directed by David Straiton. Reception "Anomaly"