 For season 7, History rebooted the program with a new concept and cast, with the series now following five American restoration shops.The show is the first spin-off of "Pawn Stars", in which Dale has appeared several times as an on-camera expert and restored various items.The series has featured cameo appearances by the cast of "Pawn Stars", "American Pickers", "Counting Cars", magician/illusionist Lance Burton & David Copperfield, NASCAR driver Greg Biffle, and musicians Sammy Hagar, Billy Joel, and Jason Mraz.