Kellogs Advertising
At the end of the opening credits you willl notice Jed pointing out something to the others towards the left camera. In the network broadcasts, the camera pivots to show that Jed is pointing to a Kellogg’s Corn Flakes billboard, the sponsor of the show.
As the car drives past it, the theme song continues, changing to the then current slogan “K-E-Double L-O-Double Good. Kellogg’s best to you”.