Continuity: It seemed strange that Mulder was surprised not to find the Arthur Dales he knew at his apartment, when in "Agua Mala," he learned that Dales had moved to Florida.

Factual error: The beginning of the episode shows a baseball game taking place in Roswell, New Mexico. A ball smashes into a sahuaro cactus. The only place in the United States of America where sahuaros grow is in the Arizona desert. There are none in New Mexico.