Mack Greenburg was born in 2012.
This episode originally aired on Michael Seater's 14th birthday - January 15, 2001 - and the day before Jake Epstein's 14th birthday.
When the Zugatian aliens declare that they're going to blow up a local tower (to fulfill their mission and prove their worth as invaders of Earth), Spence expresses his horror: "But that's the world's tallest freestanding structure. It's a national landmark." The Navigator Alien asks, "Could we visit the revolving restaurant first?" This is a veiled reference to an existing building, as well as a clear indication that the series was filmed in Toronto, Ontario, Canada. The building is Toronto's CN Tower, which from 1975 to 2007 was routinely billed as the "tallest freestanding structure in the world" (553.3 metres).