Question: It's been stated through out the show that Earth was originally inhabited by an extraterrestrial species known as 'The Colonists', that they fled the Earth during the last ice age and that they intend to re-colonize the Earth in 2012. Now, they're obviously more technologically advanced than us, so why do they want to re-colonize the Earth? There's a whole universe of planets out there to choose from. Also, why wait until 2012? Why not just invade?
GalahadFairlight
25th Apr 2009
Chosen answer: They want to return because its their home planet. Secondly The Colonists didn't expect Humans to get quite so advanced whilst they were away, so invading doesn't make sense, and is likely to ruin the planet further.
GalahadFairlight