This week on Car Talk, Dinesh is planning to spend his Summer vacation walking across Death Valley. Yes, really. Dinesh is worried about his support cars surviving the 120 degree daytime temps. Can Tom and Ray stop questioning Dinesh’s sanity long enough to advise? Elsewhere, Deb threw her husband’s BMW into Park while it was still moving. Did she do more damage to the car, or her marriage? Also, Steve wins Fun Dad of the Week— but it came with a full spousal dopeslap for driving across a stream that was deeper than expected; Mary is desperately trying to help her beloved mechanic Herman figure out why her Toyota won’t start; and, is it okay for Art History PhD’s to call themselves “Doctor”? All this and more, this week on Car Talk.