Will Smith and Tommy Lee Jones are back in their familiar garb in the first trailer for 'Men in Black III,' which is scheduled to drop on May 25, ten years after 'Men in Black II" and a decade-and-a-half after the original.

And this time, Will Smith's alien-hunting agent is going back to the beginning of the 'Men in Black' program. 

The first trailer gives a peek at the plot, where Agent J (Smith) goes back to 1969 to prevent Agent K (Jones) from being offed by an alien. Fans also get a look at Josh Brolin as Jones' younger counterpart.

Watch Brolin's expert Tommy Lee Jones impersonation, and take a first look at this next chapter in the billion dollar franchise below.

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