The filming dates for the pilot were March 17 - April 3, 2006.
This episode was filmed on location in Santa Clarita, California, USA.
Premiered with 11.40 million viewers.
At the beginning when the logo for the series is shown, the letters J E R I C H O can be heard in Morse code.
(When Old Man Oliver answers the door cocking his shotgun)
Johnston: Oh, Oliver, would you stop that.
Old Man Oliver: Sorry, Johnston. Thought you were Aliens. Well, we're under attack, by Aliens. Don't you know that?
Johnston: Yes, we do. That's why we're here. Do you have your Ham radio?
Old Man Oliver: Yeah, for you....50 cents.
Deputy: Are we under attack?
Johnston: Son, I don't want to hear that word again. Now look, this could have been a test. It could have been an accident. There's, uh, military bases near Denver. One explosion does not make an attack. If we stay calm, the town stays calm, okay.
Jake: We were both born on third base, stop pretending you hit a triple.