Maybe the film's biggest disappointment is Dwayne Johnson, playing the straight-laced FBI agent trailing our guys, but really there so he can have an epic showdown with his doppelganger Diesel. Accompanied by a spunky Brazilian cop assistant (Elsa Pataky) Johnson is hulking and committed but utterly blank as a character, lacking the devil-may-care energy of the thieves or even a proper righteous indignation; he's tracking down our heroes rather than the film's actual drug lord bad guy (Joaquim de Almeida), so it's hard to be invested in him as a character or even a threat to Dom and company.