Dandy Deal has come up with another winner.
Videocraft (Rankin-Bass) sold their first non-holiday special to NBC in 1966, airing on Thanksgiving night. The Ballad of Smokey The Bear purported to explain how Smokey got his name, as seen through the eyes of his brother (James Cagney). I caution, however, that as of late, Dandy Deal has edited off closing credits, and even bits of dialogue, from his most recent postings.
Three years later, Smokey returned, this time in a line-animated Saturday morning series for ABC, with Jackson Weaver, who was voicing Smokey in the commercials, continuing in that role. Unfortunately, it lasted just 1 season, and was replaced by The Reluctant Dragon & Mr. Toad the next year.