In the Neighborhood of Make-Believe, Mr. Anybody is looking forward to playing ball with Robert Troll who is feeling sad about that King Friday and Sara Saturday are away on their honeymoon.
Lady Elaine arrives and is glad to play ball with Mr. Anybody. She tries to include Robert Troll in the game but the ball is lost when he does not catch it. The ball is found by someone new to the Neighborhood -- Dr. William Duckbill Bagpipe Platypus IV. Dr. Bill is a veterinarian from Westwood looking for a new place to live. Robert Troll is delighted to see his old friend.
Back at the house, Mister Rogers uses one of the ducklings to explain where the name "duckbill platypus" comes from before Mr. McFeely returns to pick up the birds. Inside, Mister Rogers shares a small carving of a duckbill platypus that was given to him as a gift.
For details and more screenshots from Episode 1016 of Mister Rogers' Neighborhood, visit the Neighborhood Archive.