Graeme (Simon Pegg) and Clive (Nick Frost) are comic-book geeks who have flown from their home in England to San Diego for Comic-Con, the ultimate nerdfest. In addition to best friends since childhood, they're also collaborators -- Graeme's the artist and Clive's the writer -- on a graphic novel called "Jelva: Alien Queen of the Varvak". What better way for two geeks to enjoy their first visit to the United States than renting an RV and going on a cross-country UFO road trip?

Just outside of Area 51, Graeme and Clive have a close encounter with a mysterious car that races ahead of them, then flips and rolls. They stop and are shocked to find Paul (voiced by Seth Rogen), a smart-ass alien who has been held captive by the US Gov't for almost sixty years. Reluctantly, they give Paul a ride and are quickly taken by his good spirits, snarky comments and bonhomie. 

But there are bad men on their trail!  The mysterious Men In Black, lead by the hilariously deadpan Agent Zoil (Jason Bateman), with his incompetent twit associates Haggard (Bill Hader) and O'Reilly (Joe Lo Truglio), and directed by the even more mysterious Big Guy (a delightfully geeky bit of surprise casting I won't ruin here), and they're dead set on capturing Paul and returning him for further research.

I really enjoyed Paul and found it full of great lines, sideways references to other films and insider jokes, funny situations and a story arc that kept the comic momentum going for the entire movie. I was already a fan of Pegg and Frost from their earlier work (notably Hot Fuzz and Shaun of the Dead) but I think this is their best work to date. Just don't be surprised by the never-ending stream of obscenities along the way on this Close Encounters-inspired lunatic road trip movie.