In this week's show, Caitlin’s Jeep has a tendency to wander. The scary thing is, she lives right around the corner from us! Can she reign in her roving runaway before we get turned into road chowder? Also, David the mathematician wants to know if turning on the car's lights warms up the car any faster. And, in our latest installment of Stump the Chumps, we find out if Sam turned his cranky Honda lemon into sweet lemonade. All this and a new puzzler that'll make Scrabble junkies drool, this week on Car Talk.