I noticed in season one and two episodes, that Martin Lane drives Pontiacs and am wondering if Pontiac sponsored this show? I know Pontiac sponsored the later seasons of My Three Sons as Steve Douglas always drove a Pontiac station wagon. Of course in the first few seasons of MTS, Chevrolet sponsored the show.

I don't know if sponsorship is really the correct word here, or if they had an "arrangement" to display Pontiacs, but the first two seasons did indeed show them off. Although you don't really see too many instances of this (like, compared to all the Pontiacs you see in "Naked City," with all its on-location work). I did notice that the final season of the shot-in-California "TPDS" is different, and the few instances of new autos being shown off were no longer from GM, but from AMC.

I think "I Dream of Jeannie" used Pontiacs for a while, too.

I think the Pontiacs were used for promotional consideration in the first two seasons. On the third season, when they made a stock shot of Martin pulling into the driveway (which did not exsist in the first two "New York based" seasons), the car was now a Buick. In the episode where Patty witnesses Richard banging into another car, Richard is driving a Dodge and bangs into a Rambler Classic. The only sponsor I can recall for TPDS is Breck Hair Products. (I know there were more). I Dream of Jeannie did indeed use Pontiacs.

One sponsor I recall for TPDS was Bayer Aspirin which I think co-sponsored along with Breck.

In the S2 episode "Patty Lane, Incorporated," the pre-credit opening sequence shows Martin Lane pulling into his driveway in a 1964 Pontiac Bonneville Vista 4-door hardtop sedan. No credit is given for Pontiac providing cars in any PDS episodes.

The main sponsors for the show's first two years were Breck and General Mills (Cheerios). In the '65-'66 season, TPDS was sponsored by Nabisco and Bayer Aspirin, if I remember right.

Of course, at the end of every episode is one of the most unusual product promotional statements ever made:

...hair preparations provided by BRECK...

Pontiac DID co-sponsor a sitcom that appeared in TPDS' time slot in the 1962-63 season, "Our Man Higgins."