Mister Rogers' Neighborhood (1968)

S19E5 Secrets: A Surprise Party for Mister Rogers

Mister Rogers creates a secret message using invisible ink. Meanwhile, Mr. McFeely presents a video showcasing the process of suitcase manufacturing. In the Neighborhood of Make-Believe, Chuck Aber must break the news to Lady Elaine that he did not intend to marry her, but he does share some positive news. As the episode unfolds, Rogers discovers a clue that guides him outdoors, where he is greeted by a surprise birthday celebration organized by his friends and neighbors.