In Michigan, a late collector's home features a stockpile of awesome wheels. And a wide-eyed Mike comes up with a staggering six-figure offer--the largest in American Pickers history--to take home five ultra-rare motorbikes. Meanwhile, Danielle nails a shot-in-the-dark mission for rock'n'roll legend Jack White and then it's up to Robbie and Dave to transport a legendary recording trailer to its new home in Detroit.

In Pittsburgh, a real-life heavy metal hero reveals his mind-boggling stockpile. And in Tennessee, the team revs up for a white-knuckle winner-takes-all go-kart smackdown.