Is King Leonardo and His Short Subjects coming back?
King Leonardo and His Short Subjects (1960–1961) — children on NBC
The answer: Concluded April 8, 1961.
Watch on Peacock 
About King Leonardo and His Short Subjects
King Leonardo and His Short Subjects was an animated cartoon series released in 1960 by Total Television (which would later rename itself Leonardo Productions after the main character of this show), sponsored by General Mills.