There is a zombie apocalypse going on all over the U.S,You and the brothers are in Virginia heading towards Hershel’s farm where Rick and the rest of the MC's(main characters)are

Dean: Still ain’t gettin’ any cell service

Sam: Nope, still none. Probably won’t have any for miles, we’re in the middle of bum frick nowhere Dean: We sure that this old geezer Hershel can help us? I mean, we’ve been driving for hours with nothing but trees

Dean turns on the radio and Turns up the volume as "Carry On Wayward Son" By Kansas Plays while he drives