Trivia: The map location (47° 27' N and 122° 18' W) used in the episode is on the Eastern side of the Seattle-Tacoma International Airport (around S. 170th Street and Air Cargo Road).
Trivia: Declan drives a car with a Washington license plate: 635 DIU
Foss: You gotta stop asking questions. Forget about the past. Get on with your life. Because if you don't, if you don't, you're gonna put yourself and you're gonna to put Nicole, you're gonna put Stephen and Lori and Josh and that whole family, in danger.
Kyle: What are you talking about?
Foss: They'll kill you, Kyle. They'll kill all of you.
Kyle: All this time, I'd been trying to restore my memory, but I didn't realize that sometimes memories are better left forgotten. I wanted to know who I was, but maybe some mysteries are better left unsolved.
Josh: What is that?
Nicole: Sorry, it's one of my patients.
Josh: Was it Kyle?! Whoa! That must be his alien voice! Sort of a mix between human and... dolphin.
Declan: All we need is a Tin Man and a Cowardly Lion. (after Kyle looks confused) Never mind.
India 20 October 2007 on Star World
Slovakia 22 February 2009 on Markiza
Declan: All we need is a Tin Man and a Cowardly Lion.
A reference to two characters from The Wizard of Oz.