First appearance of Agent Reyes. Final appearances of Teresa Nemman-Hoese and Jeremiah Smith.
This was the highest rated episode of the season with 16.9 million viewers.
It was always intended that Monica Reyes be introduced at this juncture in the series as she was being groomed to take over from Gillian Anderson's (assumed) absence in Season 9 - if there was going to be a Season 9. When the series got renewed, Anderson stayed on albeit in a reduced capacity so Reyes became a major player.
When this originally aired, audiences had to wait five weeks for the story's conclusion in Deadalive (2001).
Director of photography Bill Roe was nominated for an Emmy for Outstanding Cinematography for a Single-Camera Series.