In the original show concept, Barbara Diffy was going to have a detachable head and a robotic body, which is why the character is wearing chokers and turtlenecks throughout the first season - to cover up where her head was supposed to detach. However, all scenes of this idea were cut out during the episodes aired, despite clips being included in some of the early advertisements. This was because Disney was concerned that people may possibly compare it to the Iraq beheading videos, which were popularized in 2004.
The high school that Phil attends is H.G. Wells High School, a reference to the famous author of, among several other works, "The Time Machine".
In the original script, Phil was meant to be a 12-year-old.
Creators Tim Maile and Doug Tuber have several cameo appearances throughout the series.
While Ricky Ullman was his stage name at the time, he made sure that the cast and crew all addressed him on set by his real name, Raviv.