While remembered for many wondrous accomplishments throughout his life, Dr. Barker is known around the Neighborhood as the voice and puppeteer of Dr. Bill and Elsie Jean Platypus.
In Neighborhood Episode 1384 from 1974, Mister Rogers shares some behind-the-scenes footage which includes a short segment featuring a fun and unique moment with his friend, Mr. Barker.
Mister Rogers explains: "We've been good friends for many years and that's the way we usually greet each other. With that handshake salute."
Deepest condolences go out to the family and friends of Dr. Barker.
It's a Bill Bill sad day.