Gillian Anderson only spent one day on set for this episode as she was deep in pre-production on her writing-directing debut episode, All Things (2000).
The perfect locations were found in Van Nuys, California. It turned out the residents were very resistant to yet another film crew being parked on their lawns that they rejected the production's requests to film there. As it was close to Valentine's Day, some elaborate candy gifts from the crew convinced them to change their minds.
Michelle Joyner played Ellen Adderly. Ellen's baby, Katy Adderly, was played by Ms. Joyner's real-life twin boys.
A stuntman spent 5 hours in the make-up chair being transformed into the rage monster.