The desert scenes involving the money drop and encounters with the kidnappers were actually filmed at Vasquez Rocks, northern Los Angeles County. Vasquez Rocks is an uplifted sandstone formation caused by tectonic forces of the San Andreas Fault. This location has been used in many movies and television shows.
The episode title means "Black Widow" in Spanish. Black Widow spiders are known for killing their mates.
Alex Kingston who starred in this episode, worked with Paul McCrane on E.R. Paul McCrane was the director of this episode.