Mister Rogers' Neighborhood (1968)

S02E16 Welcome the Platypus Family (1) - Playing ball in the Neighborhood of Make-Believe

With King Friday and Queen Sara off celebrating their honeymoon, Robert Troll takes the opportunity to invite his longtime friend, Dr. Bill Platypus, to the Neighborhood of Make-Believe. The arrival of Dr. Platypus brings excitement as the community gears up for some fun and games.