So this was Aliens of London without the farting?
Aliens infiltrate Earth by stealing the bodies of powerful people and plan to get more control in the hysteria caused by crashing their spaceship into a major city. They're even referred to as having zips in their heads.
I'm not bothered, mind you, because if you're borrowing from another story's plot, it might as well be from an 11 year old story that not a lot of people like (except me...).
If you must blink, do it now.