This week on Car Talk, all good things must come to an end. So, too, must all pieces of junk, as Tommy's beloved Dodge Dart finally heads to the crusher. Find out what caused its way-beyond-timely demise. Elsewhere, Fred decided to do a good deed and close the door of a stranger's parked truck. Unfortunately, a half hour later said truck caught on fire. Is Fred an unwitting arsonist? Also, Dr. Kenny takes a break from surgery to find out why his car's brakes have a mind of their own; and Monica's husband may need electroshock therapy to stop his odd behavior at stop lights. All this, plus a round of Stump the Chumps, and lots more, this week on Car Talk.