First time that Shelley Hack is featured in the intro video reel and top silhouette position, the one with the talkie-walkie, formerly occupied by Sabrina/Kate.
Premise was directly lifted from the 8 years priorly aired, Call Unicorn (1971). Just like Tiffany & Kris, Cannon even learns how to drive the 18 wheeler himself.
Tiffany's Extraordinary Abilities: the intrepid angel learns here a new aptitude, as she adds "truck driver" to her soon-to-be revealed extensive portfolio of special skills---and other extracurricular activities.
Charlie says, "Keep on truckin'." This was a popular expression in the 1970s.