Various characters from the previous films, led by Dom, unite to become the Avengers of driving through and past things. Dom's girlfriend Letty (Michelle Rodriguez) is seemingly killed -- an emotional moment that the film is in no way equipped to handle.
The Rock, sensing that his status as the baldest, tricep-est leading man in Hollywood is threatened, bursts into the series as agent Luke Hobbs. He hates Toretto's gang because they do crime, but he comes to respect them by the end because other people do worse crime.
Fast & Furious 6
Letty comes back on the scene, but she has amnesia, forcing Vin Diesel to do his first acting of the series. At the end, Han, the most beloved side character in the franchise, is killed by a mystery man.
The mystery man is revealed to be Deckard Shaw, who's avenging his brother (the bad guy from Fast & Furious 6). He's played by Jason Statham, and the world's supply of Bald Actors Not Yet Cast In Fast & Furious Movies dwindles ever more. Oh shit! Kurt Russell's here!
The Fate Of The Furious