This week on Car Talk, Tom and Ray's advice helps fix the Hubble Telescope. Plus Ray's new numerical puzzler.

What does the Chrysler-Fiat merger really mean? The return of Fiat jokes, of course! Also, a victim of catalytic converter theft explores his options, a Pontiac owner wonders who will look after his Vibe, and why is a '95 Mercedes driving all the cats out of Los Gatos, CA? Also, a new Puzzler from the world of Nouvelle Pneumatics, and lots more

Two separate incidents: A bowling sized boulder in Death Valley and a stuck ignition key, elicit the same reaction--a 2-word phase beginning with, "Oh", and ending with a word we can't print here. Also, is 15,000 miles too long between oil changes, even if the car company's paying for it, one teenager gets advice guaranteed to get his parents (and their lawyer) on the phone, and St. Elmo's fire appears on a DC street?

On Stump the Chumps, we find out whether a blanket really was the solution to a Subaru's starting problem. Also, why one woman's key ring raised her father's blood pressure, a VW with a little too much get up and go, and will Saab lust come between a woman and her family?

A wife worries that her husband's foray into "Procedural Deviancy" may croak their car. Also, the car to avoid if you're driving around Cincinnati, a classic case of a car in need of an enema, some trenchant questions from an 11 year old, and late night TV strikes again!

A Nissan owner's tire pressure warning light flashes--in front of an NSA building. Can Tom and Ray figure it out, or is this a case for Jack Bauer? Also, a Sebring begins to channel a VW diesel, a Mercedes owner can only laugh at the prospect of a 2,000 dollar brake job, and could a series of problems plaguing a Camry have been avoided by naming the car?

Is the price of a new power steering pump worth not having to admit your wife and her ex-boyfriend are right? Also, hungry squirrels choose an unlikely Corolla part as a snack, a caller returns for more buying advice 22 years later, and some thoughts from noted maritotologists Henny Youngman, Rodney Dangerfield, and Rita Rudner.

On Stump the Chumps, we find out whether Bill and his Subaru survived Mount Redoubt's eruptions. Also, a spoon prank goes awry in a Grand Am, another reason why you shouldn't trust a mechanic with hairy knuckles, and could a dealer really use feed corn to conceal a failing muffler?

A hair-singeing tale that goes beyond Tommy dropping a lit cigarette in his lap. Also, the solution to a stuck key is--yoga? Plus, why the movie classic "Gaslight" may be to blame for poor tire pressure, and on Stump the Chumps, one caller plus two problems equals a sweep, a split, or a double drubbing?

Title: Everything I Don't Know About Cars, I Learned from Car Talk For all you budding mechanics, a case study in why not to choose Tom and Ray as your mentors. Also, a Toyota owner worries her minivan's tailgate is trying to kill her, why a furniture trip ends with zero couches and two new tires, and we meet Brooklyn gas station attendants' Public Enemy Number 1.