In 1976, apparently buoyed by poor reviews and/or ratings of past specials, NBC opted not to have the Kroffts produce another Saturday morning preview special. Instead, they turned to pre-fab pop impresario Don Kirshner and In Search Of..... producer Alan Landsburg to create The Great NBC Smilin' Saturday Morning Parade, hosted by Chico & The Man star Freddie Prinze. Sounds like John Harlan, who was Bob Hope's announcer for his many specials during this period, and also announced for Name That Tune and other game shows, is the announcer here.
During this season Pink Panther expanded to 90 minutes with the addition of the Texas Toads (nee Tijuana Toads). There's also a bumper with Misterjaw trying to scare Tyrone, the "Dirty Old Man" from Rowan & Martin's Laugh-In (both voiced by Arte Johnson), a year before Tyrone would be given his own show.
Didn't see this show, so there will be no rating.