The sequence in David Palmer's Campaign Headquarters was originally at the end of the sequence in the Pilot to be a shock, but it ended up appearing too complex.
It was very difficult to fit lights anywhere in the Bauer house as it was a very tight space.
Editors tried to overlap split-screens to begin with, but Hopkins fought against it.
The premiere featured many shots of clocks; an idea that was dropped after this episode.
Carlos Bernard was cast before Stephen Hopkins joined the show.
The exterior of CTU is actually a record company near Barrington. It is one of Peter Levy's favourite shots.
The helicopter shot of Kim and Janet arriving at the furniture store was shot for several hours by Hopkins but much of it could not be used due to a lens issue.
Kim and Janet were originally going to a rave at Santa Monica Pier, but budget constraints led them to a furniture store.
Hopkins mentions Mr. Floppy and how he was included into many scenes in the first series.
Longer lenses were used in the pilot than in other episodes.
It took a long time to set up audio in the Conference Room due to the metal bars.
The Special Agent in Charge's office was very difficult to shoot in in terms of audio.
Hopkins was pressured not to have Teri Bauer smash the coffee mug due to time constraints, but he did it anyway.
The Pilot was shot in April 2001.
More "raunchy" scenes of Janet and Dan having sex were filmed, but FOX would not allow them to include it.
Each scene was specifically coloured so that viewers could instantly tell which scene they were in; Palmer's hotel was golden, CTU was blue, and Kim and Janet's scenes were "monochromatic".
The Bauer house and the York house were actually both shot at the same house.
Mandy's explosion of the plane is based on a true story of an attempt to blow up a plane.
The plane explosion was done twice as, on the first attempt, not enough paper was blowing around.
As Mandy is parachuting out of the plane, it appears to still be dark. However, the shot was filmed in an afternoon, and in fact was heavily edited to look darker.