A teaser trailer for 'I Am Number Four' hit the Internet a few months ago, but it contained little more than a logo and a quick glimpse of the film's lead, Alex Pettyfer. A second trailer for the teen-targeted sci-fi film from director D.J. Caruso ('Disturbia,' 'Eagle Eye') is now online, however, and it features much more content from the actual film. Watch it after the jump.

We're introduced to the idea that someone has begun killing off nine alien fugitives in sequential order and that Pettyfer's character is, you guessed it, the fourth on the chopping block. Not content with simply surrendering, however, Pettyfer teams up with other superpower-enabled teens (under the guidance of Timothy Olyphant) to fight back against their intergalactic bounty hunters.

Check out the trailer and if it looks like it's up your alley, mark your calendars for February 18, 2011.