The Diesel Brothers are hunkered down and preparing for the worst -- a zombie apocalypse! They share the best trucks for outrunning zombies, interview experts and get ready for an epic Zombie Battle.

Diesel Nation rolls out the red carpet for some of the biggest stars the show has ever seen. From Shaquille O'Neal to Guy Fieri, the guys check out awesome garages and challenge each other to spicy competition.

Nobody's perfect -- not even the Diesel Brothers. Special guests such as Richard Petty and Farmtruck and AZN relive their most embarrassing moments, and Keith Spiker from the Dirty 7 has no idea what kind of redemption battle he's in for.